456th Bombardment Group (H)

Base: Stornara (Foggia). A/C type: B24.

... On 15 March the group was one of several which bombed Monte Cassino in support of Fifth Army operations. The second unit of the 456th dropped its bombs in error on Allied troops, for which the deputy group commander was removed.

http://www.wikiwand.com/en/456th_Bombardment_Group#/Movement_to_Italy