11th Infantry Brigade (United States)

11th Infantry Brigade
Shoulder sleeve insignia (approved 1966)
Active	1917–1921 1926–1940 1967–1971
Country	United States
Branch	United States Army
Type	Infantry
Role	Light infantry (1967–1971)
Engagements	World War I Vietnam War My Lai massacre
Insignia
Distinctive unit insignia (approved 1966)

The 11th Infantry Brigade is an inactive infantry brigade of the United States Army. It was first formed as part of the 6th Division during World War I. It is best known for its service with the 23rd Infantry Division from 1967 through 1971 in the Vietnam War as a light infantry brigade. The brigade is known for its responsibility in the My Lai Massacre.