Helicopters made a big difference in World War II, ... 5 Little-Known Military Helicopters Used In WW2. Story by Bob Sharp • 1w. T he introduction of the helicopter changed how armies operate.

Millions of pounds of military equipment dating back to World War II are headed to Washington, D.C., for the Army’s 250th birthday parade.

Helicopters made a big difference in World War II, but some have gone unnoticed. Here are the five that should be recognized and their specs.