Mark with US Army Shoulder Sleeve Insignia: 1st | #400106

The United States Army is one of the three military departments (Army, Navy and Air Force) which reports to the Department of Defense. The modern US Army has its roots in the Continental Army, which was formed on 14 June 1775. The Armor Branch of the United States Army is an active combat arms branch. A shoulder sleeve insignia (SSI), is an embroidered patch worn on some uniforms of the United States Army. The SSI in this image was approved for the 1st Armored Division in 1940.