At the height of the Vietnam War, Infantry OCS produced 7,000 officers annually from five student battalions, all located at Ft. Benning. Also, during the war, a female OCS was once again established; it was stood up at Fort McClellan, Alabama, as part of the WAC Center and School. Other OCS programs were located at Fort Gordon, Georgia (Signal Corps); Fort Sill, Oklahoma (Artillery), Fort Lee, Virginia (Quarter Master), Fort Eustis, Virginia (Transportation), Fort Knox, Kentucky (Armor), Fort Belvoir, Virginia (Engineer) and Aberdeen Proving Ground, Maryland (Ordnance). In April 1973, a branch immaterial OCS was established at Fort Benning, ending the Infantry and Field Artillery based courses. In 1976, with the end of the gender-separate Army, the women's OCS was merged with the branch immaterial male course, creating a program very similar to the modern OCS. The United States Military Academy at West Point, New York, also admitted its first female cadets in 1976. However, due to the length of instruction there (4 years), the newly gender-integrated Officer Candidate School had the distinction of commissioning a female second lieutenant before USMA.