I was looking at some pictures of D-Day on the huffington post and noticed a picture of several men hauling an artillery piece out of a landing craft. The picture is labeled "US Marines landing at Normandy in amphibious landing craft on D-Day, June 6, 1944. (A. E. French/Archive Photos/Getty Images)" and can be found at the following link (see picture 5):
I was always under the impression that US landing forces at D-Day were Army- is this picture wrong? Or were there small numbers of US Marines involved?
While I do believe the photograph is probably incorrectly captioned, there were US Marines serving in the ETO during the war.
American battleships and cruisers in the ETO commonly had a detachment of Marines serving onboard. Sometimes, they were called in to do some action but this was in very rare cases. One extraordinary case of USMC involvement in France was during Operation Dragoon in which Marines from the USS Philadelphia and Augusta received the surrender of a German naval artillery battalion on the islands of Ratonneau and Chateau d'If.
Marines also served in the OSS (Office of Strategic Services) and I've written a much more elaborate post on one of those men - Peter J. Ortiz.