The United States of America known as the United States or America, is a country composed of 50 states, a federal district, five major self-governing territories, various possessions. At 3.8 million square miles, the United States is the world's third or fourth largest country by total area and is smaller than the entire continent of Europe's 3.9 million square miles. With a population of over 327 million people, the U. S. is the third most populous country. The capital is Washington, D. C. and the largest city by population is New York City. Forty-eight states and the capital's federal district are contiguous in North America between Canada and Mexico; the State of Alaska is in the northwest corner of North America, bordered by Canada to the east and across the Bering Strait from Russia to the west. The State of Hawaii is an archipelago in the mid-Pacific Ocean; the U. S. territories are scattered about the Pacific Ocean and the Caribbean Sea, stretching across nine official time zones. The diverse geography and wildlife of the United States make it one of the world's 17 megadiverse countries.
Paleo-Indians migrated from Siberia to the North American mainland at least 12,000 years ago. European colonization began in the 16th century; the United States emerged from the thirteen British colonies established along the East Coast. Numerous disputes between Great Britain and the colonies following the French and Indian War led to the American Revolution, which began in 1775, the subsequent Declaration of Independence in 1776; the war ended in 1783 with the United States becoming the first country to gain independence from a European power. The current constitution was adopted in 1788, with the first ten amendments, collectively named the Bill of Rights, being ratified in 1791 to guarantee many fundamental civil liberties; the United States embarked on a vigorous expansion across North America throughout the 19th century, acquiring new territories, displacing Native American tribes, admitting new states until it spanned the continent by 1848. During the second half of the 19th century, the Civil War led to the abolition of slavery.
By the end of the century, the United States had extended into the Pacific Ocean, its economy, driven in large part by the Industrial Revolution, began to soar. The Spanish–American War and World War I confirmed the country's status as a global military power; the United States emerged from World War II as a global superpower, the first country to develop nuclear weapons, the only country to use them in warfare, a permanent member of the United Nations Security Council. Sweeping civil rights legislation, notably the Civil Rights Act of 1964, the Voting Rights Act of 1965 and the Fair Housing Act of 1968, outlawed discrimination based on race or color. During the Cold War, the United States and the Soviet Union competed in the Space Race, culminating with the 1969 U. S. Moon landing; the end of the Cold War and the collapse of the Soviet Union in 1991 left the United States as the world's sole superpower. The United States is the world's oldest surviving federation, it is a representative democracy.
The United States is a founding member of the United Nations, World Bank, International Monetary Fund, Organization of American States, other international organizations. The United States is a developed country, with the world's largest economy by nominal GDP and second-largest economy by PPP, accounting for a quarter of global GDP; the U. S. economy is post-industrial, characterized by the dominance of services and knowledge-based activities, although the manufacturing sector remains the second-largest in the world. The United States is the world's largest importer and the second largest exporter of goods, by value. Although its population is only 4.3% of the world total, the U. S. holds 31% of the total wealth in the world, the largest share of global wealth concentrated in a single country. Despite wide income and wealth disparities, the United States continues to rank high in measures of socioeconomic performance, including average wage, human development, per capita GDP, worker productivity.
The United States is the foremost military power in the world, making up a third of global military spending, is a leading political and scientific force internationally. In 1507, the German cartographer Martin Waldseemüller produced a world map on which he named the lands of the Western Hemisphere America in honor of the Italian explorer and cartographer Amerigo Vespucci; the first documentary evidence of the phrase "United States of America" is from a letter dated January 2, 1776, written by Stephen Moylan, Esq. to George Washington's aide-de-camp and Muster-Master General of the Continental Army, Lt. Col. Joseph Reed. Moylan expressed his wish to go "with full and ample powers from the United States of America to Spain" to seek assistance in the revolutionary war effort; the first known publication of the phrase "United States of America" was in an anonymous essay in The Virginia Gazette newspaper in Williamsburg, Virginia, on April 6, 1776. The second draft of the Articles of Confederation, prepared by John Dickinson and completed by June 17, 1776, at the latest, declared "The name of this Confederation shall be the'United States of America'".
The final version of the Articles sent to the states for ratification in late 1777 contains the sentence "The Stile of this Confederacy shall be'The United States of America'". In June 1776, Thomas Jefferson wrote the phrase "UNITED STATES OF AMERICA" in all capitalized letters in the headline of his "original Rough draught" of the Declaration of Independence; this draft of the document did not surface unti
Battle of Chochiwon
The Battle of Chochiwon was an early engagement between United States and North Korean forces during the Korean War, taking place in the villages of Chonui and Chochiwon in western South Korea on July 10–12, 1950. After three days of intense fighting, the battle ended in a North Korean victory; the United States Army's 21st Infantry Regiment, 24th Infantry Division was assigned to delay two advancing North Korean People's Army divisions following communist victories at Osan and Chonan earlier in the month. The regiment deployed along roads and railroads in between the two villages, attempting to slow the advance as much as possible. Aided by air strikes, U. S. Army units were able to inflict substantial damage on the North Korean armor and other vehicles, but were overwhelmed by North Korean infantry; the two understrength U. S. battalions fought in several engagements over the three-day period and suffered massive losses in personnel and equipment, but were able to delay the North Korean forces for several days, allowing the remainder of the 24th Infantry Division to set up blocking positions along the Kum River near the city of Taejon.
On the night of June 25, 1950, 10 divisions of the North Korean People's Army launched a full-scale invasion on the nation's neighbor to the south, the Republic of Korea. Advancing with 89,000 men in six columns, the North Koreans caught the South Korean Army by surprise, resulting in a disastrous rout for the South Koreans who were disorganized, ill-equipped, unprepared for war. Numerically superior, North Korean forces destroyed isolated resistance, pushing down the peninsula against the South Koreans who could muster just 38,000 men to the front-line to oppose them; the majority of the South Korean forces retreated in the face of the invasion, by June 28 the North Koreans had captured the capital Seoul, forced the government and its shattered forces to withdraw further southwards. Meanwhile, the United Nations Security Council voted to send assistance to the collapsing country and United States President Harry S. Truman subsequently ordered ground troops into the nation. However, U. S. forces in the Far East had been decreasing since the end of World War II, five years earlier.
At the time, the closest force was the 24th Infantry Division of the Eighth United States Army, stationed in Japan under the command of William F. Dean. Tellingly, the division was under strength and most of its equipment was antiquated due to reductions in military spending, yet in spite of these deficiencies the division was ordered into South Korea, tasked with taking the initial "shock" of the North Korean advances until the rest of the Eighth Army could arrive and establish a defense. The plan was to airlift one battalion of the 24th Infantry Division into South Korea via C-54 Skymaster transport aircraft and block advancing North Korean forces while the remainder of the division was transported on ships; the 21st Infantry Regiment was identified as the most combat-ready of the 24th Infantry Division's three regiments, the 21st Infantry's 1st Battalion was selected because its commander, Lieutenant Colonel Charles B. Smith, was the most experienced, having commanded a battalion at the Battle of Guadalcanal during World War II.
On July 5, Task Force Smith engaged North Korean forces at the Battle of Osan, delaying over 5,000 North Korean infantry for seven hours before being routed and forced back. During that time, the U. S. 34th Infantry Regiment set up a line between the villages of Pyongtaek and Ansong, 10 miles south of Osan, to fight the next delaying action against the advancing North Korean forces. The 34th Infantry Regiment was unprepared for a fight; the 1st Battalion, left alone against the North Koreans resisted their advance in the brief and disastrous Battle of Pyongtaek. The 34th Infantry was unable to stop North Korean armor. After a 30-minute fight, the 34th mounted a disorganized retreat in which many soldiers abandoned equipment and retreated without resisting the North Korean forces; the Pyongtaek—Ansong line was unable to delay the North Korean force or inflict heavy casualties on them. The regiment subsequently retreated to Chonan, the next night the 3rd Battalion was engaged in another delaying action.
The 34th Infantry lost its commander, Colonel Robert R. Martin as well as two thirds of its 3rd Battalion's strength; the exhausted 34th Infantry Regiment retreated to the Kum River, near the 24th Infantry Division's headquarters. The 24th Infantry Division would make one final delaying action before it would be forced to make its final stand around Taejon, the only major defensible city left before the Pusan Perimeter being established by the Eighth Army. Having pushed back U. S. forces at Osan and Chonan, the North Korean 4th Infantry Division, supported by elements of the 105th Armored Division, continued its advance down the Osan—Chonan road, up to 12,000 men strong under division commander Lee Kwon Mu in two infantry regiments supported by dozens of tanks. Behind it, the North Korean 3rd Infantry Division had yet to engage the American forces. By July 7, the 21st Infantry Regiment had been established at Chochiwon, one of two roads to the Kum River and Taejon; the regiment was ordered to keep the road through the region open so supplies and ammunition could flow through it to the 34th Infantry Regiment on the front lines.
The Americans spent several days unloading supplies from locomotives in the village. After blowing up all bridges north of the town, 1st Battalion was established on the Chochiwon road at Chonui, 12 miles south of Chonan. Supporting it were one battery of 155-mm howitzers from the 11th Field Artillery Battalion and A Company of t
The Hadong Ambush was an engagement between United States and North Korean forces, occurring on July 27, 1950, in the village of Hadong in southern South Korea, early in the Korean War. The fight ended in a North Korean victory following a successful ambush of US forces which resulted in heavy American casualties; the US Army's 3rd Battalion, 29th Infantry Regiment, a newly formed unit consisting of inexperienced new arrivals, was ordered to move to the South Korean village of Hadong to hold the pass there from advancing forces of the North Korean Korean People's Army. Unprepared for combat, the American forces walked into an ambush in which most of the battalion's command staff was killed in the pass, leaving lower-ranking soldiers to mount a disorganized defence against North Korean troops occupying prepared positions on higher ground. For three hours the battalion fought, pinned in a crossfire by North Korean soldiers on higher ground. North Korean forces were able to divide the American force and kill most of its commanders, further disorganizing the men.
Following the failed operation, the wounded US commander ordered a withdrawal, which became disorganized, resulting in hundreds of casualties. Destroyed after its first engagement, the 3rd Battalion, 29th Infantry Regiment was disbanded and merged with other units as the North Korean forces advanced through the pass and attacked US positions to the east. Following the invasion of South Korea by North Korea, the subsequent outbreak of the Korean War as a result, the United Nations decided to commit troops to the conflict on behalf of South Korea; the United States subsequently sent ground forces to the Korean peninsula with the goal of fighting back the North Korean invasion and to prevent South Korea from collapsing. However, US forces in the Far East had been decreasing since the end of World War II in 1945, at the time the closest forces were the 24th Infantry Division of the Eighth United States Army, headquartered in Japan; the division was understrength, most of its equipment was antiquated due to reductions in military spending.
Regardless, the 24th Infantry Division was ordered into South Korea. The 24th Infantry Division was the first US unit sent into Korea with the mission to take the initial "shock" of North Korean advances, delaying much larger KPA units to buy time to allow follow-on forces to arrive; the division was outnumbered and outgunned for several weeks as it attempted to delay the KPA, making time for the 7th Infantry Division, 25th Infantry Division, 1st Cavalry Division and other Eighth Army supporting units to move into position. Republic of Korea Army forces in the meantime were systematically defeated and forced south along Korea's east coast, with entire divisions being overrun by the KPA's superior firepower and equipment. Advance elements of the 24th Infantry Division were badly defeated in the Battle of Osan on July 5, during the first battle between American and North Korean forces. For the first month after the defeat of Task Force Smith, 24th Infantry Division soldiers were defeated and forced south by the KPA's superior numbers and equipment.
The regiments of the 24th Infantry Division were systematically pushed south in battles around Chochiwon and Pyongtaek. The 24th Infantry Division made a final stand in the Battle of Taejon, being completely destroyed but delaying North Korean forces from advancing until July 20. By that time, the Eighth Army's force of combat troops were equal to North Korean forces attacking the region at around 70,000 for each side, with new UN units arriving every day. On July 20, 400 hastily assembled; the inexperienced soldiers were assigned to the 29th Infantry Regiment, 2nd Infantry Division, a command, preparing other battalions to move into Korea and to relieve the other units of the 24th Infantry Division. The new formations, now consisting of soldiers who had no combat experience and grouped into two battalions, were sent into Pusan; the headquarters of the regiment remained behind to form a new regiment. This regiment would be in charge of the defense of Okinawa but would be rushed into Korea; the two battalions landed in Pusan on July 21 and were assigned to the 19th Infantry Regiment, 24th Infantry Division, but they retained their designations as the 1st and 3rd Battalions of the 29th Infantry Regiment.
Instead of being given time to train and prepare to enter the front lines, the battalions were sent to the regiment's sector at Chinju. By July 22 the units were on the front lines with new equipment; the equipment, fresh from production lines, was not prepared for combat, despite promises from several commanders that the unit would be given time to do so. American planners believed that the Hadong area was under attack from elements of the KPA 4th Division, having just received replacements following its victory at Taejon. However, the soldiers in the area were from the KPA 6th Division under the command of General Pang Ho San; the two divisions were coordinating to envelop the UN's left flank and were spread out. Therefore, only groups of a few hundred were advancing through the region, some with small numbers of tanks. After arrival, the commanding officer of the 19th Infantry Regiment, Colonel Ned D. Moore, ordered the 3rd Battalion, 29th Infantry to move out and seize the Hadong pass, a road junction 35 miles southwest of Chinju, where about 500 North Korean soldiers were reported to be moving.
Eighth Army had received reports that the KPA had been fighting South Korean police who were resisting in the village of Hadong, 1 mile west of the pass. The battalion commander, Lieutenant Colonel
Battle of Inchon
The Battle of Inchon was an amphibious invasion and battle of the Korean War that resulted in a decisive victory and strategic reversal in favor of the United Nations. The operation involved some 75,000 troops and 261 naval vessels, led to the recapture of the South Korean capital of Seoul two weeks later; the code name for the operation was Operation Chromite. The battle ended on 19 September. Through a surprise amphibious assault far from the Pusan Perimeter that UN and South Korean forces were defending, the undefended city of Incheon was secured after being bombed by UN forces; the battle ended a string of victories over the Korean People's Army. The subsequent UN recapture of Seoul severed the KPA's supply lines in South Korea; the UN and South Korean forces were commanded by General of the Army Douglas MacArthur of the United States Army. MacArthur was the driving force behind the operation, overcoming the strong misgivings of more cautious generals to a risky assault over unfavorable terrain.
The battle was followed by a rapid collapse of the North Korean army. From the outbreak of the Korean War following the invasion of South Korea by North Korea on 25 June 1950, the Korean People's Army, had enjoyed superiority in both manpower and ground combat equipment over the South Korean Army and United Nations forces dispatched to South Korea to prevent it from collapsing; the North Korean strategy was to aggressively pursue UN and South Korean forces on all avenues of approach south and to engage them, attacking from the front and initiating a double envelopment of both flanks of the defending units, which allowed the North Koreans to surround and cut off the opposing force, forcing it to retreat in disarray. From their initial 25 June offensive to fighting in July and early August, the North Koreans used this tactic to defeat the UN forces they encountered and push it south. However, with the establishment of the Pusan Perimeter in August, UN forces held a continuous line which the North Koreans could not flank.
The KPA advantages in numbers decreased daily as the superior UN logistical system brought in more troops and supplies to the UN forces. When the North Koreans approached the Busan Perimeter on 5 August, they attempted the same frontal assault technique on the four main avenues of approach into the perimeter. Throughout August, they conducted direct assaults resulting in the Battle of Masan, the Battle of Battle Mountain, the First Battle of Naktong Bulge, the Battle of Taegu, the Battle of the Bowling Alley. On the east coast of the Korean Peninsula, the South Koreans repulsed three North Korean divisions at the Battle of P'ohang-dong; the North Korean attacks stalled. All along the front, the North Korean troops reeled from these defeats, the first time in the war North Korean tactics had failed. By the end of August the North Korean troops had been pushed beyond their limits and many of the original units were at far reduced strength and effectiveness. Logistic problems wracked the KPA, shortages of food, weapons and replacement soldiers proved devastating for North Korean units.
However, the North Korean force retained high morale and enough supply to allow for another large-scale offensive. On 1 September the North Koreans threw their entire military into one final bid to break the Pusan Perimeter, the Great Naktong Offensive, a five-pronged simultaneous attack across the entire perimeter; the attack caught UN forces by surprise and overwhelmed them. North Korean troops attacked Kyongju, surrounded Taegu and Ka-san, recrossed the Naktong Bulge, threatened Yongsan, continued their attack at Masan, focusing on Nam River and Haman. However, despite their efforts, in one of the most brutal fights of the Korean War, the North Koreans were unsuccessful. Unable to hold their gains, the KPA retreated from the offensive a much weaker force, vulnerable to counterattack. Days after the beginning of the war, General of the Army Douglas MacArthur, the US Army officer in command of all UN forces in Korea, envisioned an amphibious assault to retake the Seoul area; the city had fallen in the first days of the war in the First Battle of Seoul.
MacArthur wrote that he thought the North Korean army would push the Republic of Korea Army back far past Seoul. He said he decided days after the war began that the battered and under-equipped South Koreans, many of whom did not support the South Korean government put in power by the United States, could not hold off the North Korean forces with American support. MacArthur felt that he could turn the tide if he made a decisive troop movement behind North Korean lines, preferred Inchon, now known as Incheon, over Chumunjin-up or Kunsan as the landing site, he had envisioned such a landing, code named Operation Bluehearts, for 22 July, with the US Army's 1st Cavalry Division landing at Incheon. However, by 10 July the plan was abandoned as it was clear the 1st Cavalry Division would be needed on the Pusan Perimeter. On 23 July, MacArthur formulated a new plan, code-named Operation Chromite, calling for an amphibious assault by the US Army's 2nd Infantry Division and the United States Marine Corps' 5th Marine Regiment in mid-September 1950.
This, too fell through. MacArthur decided instead to use the US Army's 7th Infantry Division, his last reserve unit in East Asia, to conduct the operation as soon as it could be raised to wartime strength. In preparation for the invasion, MacArthur activated the US Army's X Corps to act as the command for the landin
China the People's Republic of China, is a country in East Asia and the world's most populous country, with a population of around 1.404 billion. Covering 9,600,000 square kilometers, it is the third- or fourth-largest country by total area. Governed by the Communist Party of China, the state exercises jurisdiction over 22 provinces, five autonomous regions, four direct-controlled municipalities, the special administrative regions of Hong Kong and Macau. China emerged as one of the world's earliest civilizations, in the fertile basin of the Yellow River in the North China Plain. For millennia, China's political system was based on hereditary monarchies, or dynasties, beginning with the semi-legendary Xia dynasty in 21st century BCE. Since China has expanded, re-unified numerous times. In the 3rd century BCE, the Qin established the first Chinese empire; the succeeding Han dynasty, which ruled from 206 BC until 220 AD, saw some of the most advanced technology at that time, including papermaking and the compass, along with agricultural and medical improvements.
The invention of gunpowder and movable type in the Tang dynasty and Northern Song completed the Four Great Inventions. Tang culture spread in Asia, as the new Silk Route brought traders to as far as Mesopotamia and Horn of Africa. Dynastic rule ended in 1912 with the Xinhai Revolution; the Chinese Civil War resulted in a division of territory in 1949, when the Communist Party of China established the People's Republic of China, a unitary one-party sovereign state on Mainland China, while the Kuomintang-led government retreated to the island of Taiwan. The political status of Taiwan remains disputed. Since the introduction of economic reforms in 1978, China's economy has been one of the world's fastest-growing with annual growth rates above 6 percent. According to the World Bank, China's GDP grew from $150 billion in 1978 to $12.24 trillion by 2017. Since 2010, China has been the world's second-largest economy by nominal GDP and since 2014, the largest economy in the world by purchasing power parity.
China is the world's largest exporter and second-largest importer of goods. China is a recognized nuclear weapons state and has the world's largest standing army and second-largest defense budget; the PRC is a permanent member of the United Nations Security Council as it replaced the ROC in 1971, as well as an active global partner of ASEAN Plus mechanism. China is a leading member of numerous formal and informal multilateral organizations, including the Shanghai Cooperation Organization, WTO, APEC, BRICS, the BCIM, the G20. In recent times, scholars have argued that it will soon be a world superpower, rivaling the United States; the word "China" has been used in English since the 16th century. It is not a word used by the Chinese themselves, it has been traced through Portuguese and Persian back to the Sanskrit word Cīna, used in ancient India."China" appears in Richard Eden's 1555 translation of the 1516 journal of the Portuguese explorer Duarte Barbosa. Barbosa's usage was derived from Persian Chīn, in turn derived from Sanskrit Cīna.
Cīna was first used including the Mahābhārata and the Laws of Manu. In 1655, Martino Martini suggested that the word China is derived from the name of the Qin dynasty. Although this derivation is still given in various sources, it is complicated by the fact that the Sanskrit word appears in pre-Qin literature; the word may have referred to a state such as Yelang. The meaning transferred to China as a whole; the origin of the Sanskrit word is still a matter of debate, according to the Oxford English Dictionary. The official name of the modern state is the "People's Republic of China"; the shorter form is "China" Zhōngguó, from zhōng and guó, a term which developed under the Western Zhou dynasty in reference to its royal demesne. It was applied to the area around Luoyi during the Eastern Zhou and to China's Central Plain before being used as an occasional synonym for the state under the Qing, it was used as a cultural concept to distinguish the Huaxia people from perceived "barbarians". The name Zhongguo is translated as "Middle Kingdom" in English.
Archaeological evidence suggests that early hominids inhabited China between 2.24 million and 250,000 years ago. The hominid fossils of Peking Man, a Homo erectus who used fire, were discovered in a cave at Zhoukoudian near Beijing; the fossilized teeth of Homo sapiens have been discovered in Fuyan Cave in Hunan. Chinese proto-writing existed in Jiahu around 7000 BCE, Damaidi around 6000 BCE, Dadiwan from 5800–5400 BCE, Banpo dating from the 5th millennium BCE; some scholars have suggested. According to Chinese tradition, the first dynasty was the Xia, which emerged around 2100 BCE; the dynasty was considered mythical by historians until scientific excavations found early Bronze Age sites at Erlitou, Henan in 1959. It remains unclear whether these sites are the remains of the Xia dynasty or of another culture from the same period; the succeeding Shang dynasty is the earliest to be confirmed by contemporary records. The Shang ruled the plain of the Yellow River in eastern China from the 17th to the 11th century BCE.
Their oracle bone script
Second Battle of Naktong Bulge
The Second Battle of Naktong Bulge was an engagement between United Nations and North Korean forces early in the Korean War from September 1 to September 15, 1950, along the Naktong River in South Korea. It was a part of the Battle of Pusan Perimeter, was one of several large engagements fought simultaneously; the battle ended in a victory for the United Nations after large numbers of United States and Republic of Korea troops repelled a strong North Korean attack. After the First Battle of Naktong Bulge, the US Army's 2nd Infantry Division was moved to defend the Naktong River line; the division, untried in combat, was struck with a strong attack by several divisions of the North Korean People's Army which crossed the river and struck all along the division's line. The force of the attack split the US 2nd Infantry Division in half, the North Koreans were able to penetrate to Yongsan, promoting a fight there; the urgency of the threat to Pusan Perimeter prompted the US Marine Corps 1st Provisional Marine Brigade to be brought in to reinforce the US Army troops.
In two weeks of heavy fighting, the US forces were able to force the North Koreans out of the Naktong Bulge region. The North Koreans were further repulsed after the UN counterattack at Inchon, which culminated in the virtual destruction of the North Korean army. From the outbreak of the Korean War and the invasion of South Korea by the North, the North Korean People's Army had enjoyed superiority in both manpower and equipment over both the Republic of Korea Army and the United Nations forces dispatched to South Korea to prevent it from collapsing; the North Korean strategy was to aggressively pursue UN and ROK forces on all avenues of approach south and to engage them aggressively, attacking from the front and initiating a double envelopment of both flanks of the unit, which allowed the North Koreans to surround and cut off the opposing force, which would be forced to retreat in disarray leaving behind much of its equipment. From their initial June 25 offensive to fights in July and early August, the North Koreans used this strategy to defeat any UN force and push it south.
However, when the UN forces, under the Eighth United States Army, established the Pusan Perimeter in August, the UN troops held a continuous line along the peninsula which North Korean troops could not flank, their advantages in numbers decreased daily as the superior UN logistical system brought in more troops and supplies to the UN army. When the North Koreans approached the Pusan Perimeter on August 5, they attempted the same frontal assault technique on the four main avenues of approach into the perimeter. Throughout August, the NK 6th Division, the NK 7th Division engaged the US 25th Infantry Division at the Battle of Masan repelling a UN counteroffensive before countering with battles at Komam-ni and Battle Mountain; these attacks stalled as UN forces, well equipped and with plenty of reserves repelled North Korean attacks. North of Masan, the NK 4th Division and the US 24th Infantry Division sparred in the Naktong Bulge area. In the First Battle of Naktong Bulge, the North Korean division was unable to hold its bridgehead across the river as large numbers of US reserve forces were brought in to repel it, on August 19, the NK 4th Division was forced back across the river with 50 percent casualties.
In the Taegu region, five North Korean divisions were repulsed by three UN divisions in several attempts to attack the city during the Battle of Taegu. Heavy fighting took place at the Battle of the Bowling Alley where the NK 13th Division was completely destroyed in the attack. On the east coast, three more North Korean divisions were repulsed by the South Koreans at P'ohang-dong during the Battle of P'ohang-dong. All along the front, the North Korean troops were reeling from these defeats, the first time in the war their strategies were not working. In planning its new offensive, the North Korean command decided any attempt to flank the UN force was impossible due to the support of the UN navy. Instead, they opted to use frontal attack to breach the perimeter and collapse it as the only hope of achieving success in the battle. Fed by intelligence from the Soviet Union the North Koreans were aware the UN forces were building up along the Pusan Perimeter and that it must conduct an offensive soon or it could not win the battle.
A secondary objective was to destroy the UN and ROK units in that city. As part of this mission, the North Korean units would first cut the supply lines to Taegu. On August 20, the North Korean commands distributed operations orders to their subordinate units; the North Koreans called for a simultaneous five-prong attack against the UN lines. These attacks would overwhelm the UN defenders and allow the North Koreans to break through the lines in at least one place to force the UN forces back. Five battle groupings were ordered; the center attack called for the NK 9th Division, NK 4th Division, NK 2nd Division, NK 10th Division break through the US 2nd Infantry Division at the Naktong Bulge to Miryang and Yongsan. During the North Koreans' September 1 offensive, the US 25th Infantry Division's US 35th Infantry Regiment was engaged in the Battle of Nam River north of Masan. On the 35th Regiment's right flank, just north of the confluence of the Nam River and the Naktong River, was the US 9th Infantry Regiment, US 2nd Infantry Division.
There, in the southernmost part of the 2nd Infantry Division zone, the 9th Infantry Regiment held a sector more than 20,000 yards long, including the bulge area of the Naktong where the First Battle of Naktong Bulge had taken place earlier in August. Each US infantry company on the river line here had a front of 3,000 feet to 4,000 feet