As part of the 502d Regimental Combat Team on D-Day, the 377th PFAB was tasked with destroying a German battery of four 122mm howitzers and other installations in the rear of the northern sector of the beach near St. Martin-de-Varreville.
The objective was to secure the 101st northern flank. However, due to the loss of two planeloads and the wide scattering of the remaining battalion sticks the 377th loss 11 of their 12 75mm pack howitzers. Even though the battalion was unable to assist the 502d in their objective as an artillery unit, most of the artillerymen were able to fight as infantrymen with various groups on D-Day.