The 1953 Iranian coup d'état, known in Iran as the 28 Mordad coup d'état, was the U.S.- and British-instigated, Iranian army-led overthrow of the elected Prime Minister Mohammad Mosaddegh in favor of strengthening the monarchical rule of the shah, Mohammad Reza Pahlavi, on 19 August 1953, with one of the significant objectives being to protect British oil interests in Iran. It was aided by the United States and the United Kingdom.

Iran, also known as Persia and officially the Islamic Republic of Iran (IRI), is a country in West Asia. It is bordered by Iraq to the west and Turkey to the northwest, Azerbaijan, Armenia, the Caspian Sea and Turkmenistan to the north, Afghanistan to the east, Pakistan to the southeast, the Gulf of Oman and the Persian Gulf to the south. With a mostly Persian-ethnic population of almost 90 million in an area of 1,648,195 km2, Iran ranks 17th globally in both geographic size and population. It is the sixth-largest country entirely in Asia, the second-largest in West Asia, and one of the world's most mountainous countries. Officially an Islamic republic, Iran has a Muslim-majority population. The country is divided into five regions with 31 provinces. The nation's capital and most populous city is Tehran, with around 16 million people in its metropolitan area. Other major cities include Mashhad, Isfahan, Karaj, and Shiraz.