The Army Combat Uniform (ACU) is the current combat uniform worn by the United States Army, U.S. Air Force, and U.S. Space Force. Within U.S. Air Force and U.S. Space Force, it is referred to as the OCP Uniform, rather than the Army Combat Uniform.
U.S. Army soldiers in May 2011, wearing the ACU in the Universal Camouflage Pattern, along with its replacement MultiCam pattern (second from left) in Paktika province, Afghanistan
The ACU of a U.S. Navy sailor attached to a U.S. Army unit during the Iraq War, August 2009
A U.S. Army soldier in June 2005 wearing the ACU in UCP with matching IBA vest and ACH helmet
The Battle Dress Uniform (BDU) is a camouflaged combat uniform that was used by the United States Armed Forces as their standard combat uniform from the early 1980s to the mid-2000s. Since then, it has been replaced or supplanted in every branch of the U.S. Armed Forces.
U.S. Marine Corps BDU blouse in woodland pattern, wearer's nametape removed. The ironed-on "EGA" on the breast pocket is barely visible due to wear.
A man and woman modelling early prototypes of the BDU in 1980
U.S. Air Force Security Forces Defenders train at Fort Huachuca, Arizona in October 2004, wearing BDUs
A U.S. Air Force missile maintainer, wearing a BDU, inspects an ICBM guidance system in March 2006