This is the U.S. Army Green Flag. This flag represents the US Army because it has the seal of the army on it.
FLAG QUALITY AND USES
Standard Quality
Construction: Super-weave polyester
The U.S. Navy Flag is used by the Navy. The Navy Flag, like other military flags, has the emblem of its branch in its center. It was first used on April 24th, 1959.
The U.S. Virgin Islands Flag was adopted May 17th, 1921. The white is a symbol of purity. The emblem is a simple version of the U.S. arms. The VI stands for Virgin Islands.