Saint-Mere-Eglise, France, June 4, 2009: Pete Cuthbertson, a reenactor from Scotland, shows off his 1943 Harley 750 WLA motorcycle. Not wanting to cut any historical corners, he outfitted the 1943 military police bike with all the right accessories, from a leather satchel to a fully loaded cloth tool kit. Reenactors from across Europe descended upon French coastal towns for the 65th anniversary of D-Day.

Military reenactors are a big part of any World War II commemoration in Europe, particularly those devoted to the United States. But who are these people and what motivates them? And is their underwear authentic too? Find out here.

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