I Corps was a corps of the Army of the Republic of Vietnam (ARVN), the army of the nation state of South Vietnam that existed from 1955 to 1975. It was one of four corps of the ARVN. This was the northernmost region of South Vietnam, bordering North Vietnam at the Vietnamese Demilitarized Zone (DMZ). These five provinces are Quảng Trị Province,, Thừa Thiên-Huế Province,, Quảng Nam Province,, Quảng Tín Province, and Quảng Ngãi Province,.
Initial phase of PAVN offensive in I Corps
Army of the Republic of Vietnam
The Army of the Republic of Vietnam composed the ground forces of the South Vietnamese military from its inception in 1955 to the Fall of Saigon in April 1975. At the ARVN's peak, an estimated 1 in 9 citizens of South Vietnam were enlisted, composed of Regular Forces and the more voluntary Regional Forces and the Popular Force militias. It is estimated to have suffered 1,394,000 casualties during the Vietnam War.
Early unmodified ARVN M113 during the Vietnam War
Two United States soldiers and one South Vietnamese soldier waterboard a captured North Vietnamese prisoner of war near Da Nang, 1968.
M41 Walker Bulldog was used by the ARVN
ARVN Operations, 1965