The US Army's 933rd Anti-Aircraft Artillery (Automatic Weapons) Battalion was a Ground Unit active from 1942-1959. When the 76th Coast Artillery (AA) (Colored) Regiment was inactivated in 1943, some members of that Battalion were redesignated to the 933rd AAA.

Battery B was stationed on the south side of Inchon Harbor (Battery C was stationed on the north side).

Battery B received special orders on April 8, 1953, for assignment to USA Forces Far East Yokohama Japan, with an EDCSA date of July 22, 1953, for the period August-November of 1953. Battery B's last engagement, before the armistice, was on July 16, 1953, when Inchon was bombed by a single engine bi-wing plane named “Bed Check Charlie.” Casualties were minimal, but there was damage to ammo storage, trucks and communication wire because of fires caused by the bombing.

Many members of Battery B returned to Fort Lewis, Washington, in December of 1953.

Photo measures about 3-1/4" x 4-3/8".