The 49th Armored Division —nicknamed the "Lone Star"— was an armored division of the Texas Army National Guard during the Cold War. Active from 1947, the division formed part of the Texas Army National Guard together with the 36th Infantry Division. It was called up for active duty between 1961 and 1962 during the Berlin Crisis. In 1968 both Texas divisions were inactivated and used to form separate units. The 49th Armored was reformed in 1973 as the sole Texas division. When reflagged as the 36th Infantry Division in 2004, it was the last armored division remaining in the United States Army National Guard.