infantry battalion in the United States Marine Corps, based out of Kāne'ohe, Hawai'i, and consisting of approximately 800 Marines and Sailors.Known as "America's Battalion", the unit falls under the 3rd Marine Regiment of the 3rd Marine Division.The battalion was originally at Camp Lejeune, North Carolina in 1942 and saw action on both Bougainville and Guam during World War II. Following the war, it was disbanded until 1951, when it was reformed in California. The battalion was alerted for possible deployment during the 1956 Suez War and the 1958 intervention in Lebanon. In 1965, the Marines of 3rd Battalion were deployed to Vietnam and participated in Operation Starlite, the first major Marine engagement of that conflict. The battalion continued to see major action through the Vietnam War and was rotated back to the United States in 1969. Around the end of the Vietnam War, 3rd Battalion was deactivated for a second time in 1974.