These Marines killed so many Germans, the Nazis thought they were an entire allied battalion.
Less than two months after D-Day, Marine Maj. Peter J. Ortiz, five other Marines, and an Army Air Corps officer parachuted into France to assist a few hundred French resistance fighters.
This rough-and-ready group launched many successful ambushes against the invading Germans. The exact casualty counts are unknown but the Americans and resistance fighters inflicted so much damage that German intelligence believed an entire allied battalion had jumped in to assist the resistance instead of only 4 Marines and a soldier.
I never knew any marines fought the Germans They were fighting in the pacific against the Japanese' Only Army fought the Germans
As an old soldier I could be wrong.
There were small attachments of Marine special operations guerrilla warfare with resistance fighters