I Was Monty's Double

If official documentation didn't exist, we'd never believe a fantastic yarn like I Was Monty's Double. Actor M.E. Clifton James plays himself, a British stock-company actor who becomes an unsung hero during World War II. It seems that James, serving his country as a junior officer, is the exact double of General Montgomery. Major John Mills trains James to impersonate Montgomery to the last detail, then sends the actor on a tour of North Africa, the better to divert the German's attentions away from the real "Monty." Based on James' own written reminiscences, I Was Monty's Double was released in the U.S. under the baffling title Hell, Heaven or Hoboken! (official distributor synopsis)