The 344th BG began operations in March 1944, attacking airfields, missile sites, marshaling yards, submarine shelters, coastal defenses, and other targets in German-occupied France, Belgium, and the Netherlands. Beginning in May, the 344th helped prepare for the Normandy invasion by striking vital bridges in France. The Pathfinders were a provisional squadron equipped with the top-secret Pff (Oboe) navigational equipment. The Pathfinders would lead a group of 17 planes over the target. The 344th Bombardment Group was selected to lead the IX Bomber Command formations on D-Day, with the first aircraft taking off at 04:12 hours, attacking coastal batteries at Cherbourg, and during the remainder of June, it supported the drive that resulted in the seizure of the Cotentin Peninsula.