Battery A, 377th Field Artillery Regiment was constituted in the Organized Reserves at Oshkosh, Wisconsin in 1921.

After initial training, the battery sailed to England, arriving in Liverpool on 18 October 1943.

Based at Benham Valence, Berkshire, England, the battalion conducted additional training in preparation for Operation Overlord.

On 7 June 1944, 33 artillerymen from the battery, under the command of Lt Thomas Swirczynski captured 130 Germans near Hau-des-dunes.

Other artillerymen from the battery served with other artillery units, manning salvaged US pieces and even captured German howitzers.