Devil's Brigade
A joint American-Canadian commando group which served in WWII. Composed primarily of lumberjacks, forest rangers, hunters, and game wardens, they received rigorous and intensive training in stealth tactics, hand-to-hand combat, the use of explosives for demolition, amphibious warfare, rock climbing and mountain fighting, and as ski troops. Their formation patch was a red arrowhead with the words CANADA and USA. They even had a specially designed fighting knife made for them called the V-42.
They were the real heroes who liberated Rome, not the fully-American soldiers, as widley assumed.