21st, 27th and 867th Bombardment Squadrons, AAF

The 21st Bombardment Squadron (Heavy) was one of a small number of USAAF units to take part in the fighting on the Aleutian Islands, becoming one of the first squadrons to make a land-based attack on the Japanese home islands.
The 27th Bombardment Squadron spent 1942 and 1943 flying anti-submarine warfare patrols and training replacement crews before moving to the Central Pacific in November 1943 to take part in the island hopping campaign.Despite its eventual high number the 867th Bombardment Squadron was in action almost from the start of the American involvement in the Second World War, flying anti-submarine warfare patrols for eighteen months before joining the Seventh Air Force as a heavy bomber squadron with the 494th Bombardment Group.