'The Ontos, possibly the most downright eccentric armored vehicle ever concocted for the U.S. Military. It was a tiny tank, armed with six M40 recoilless rifles, which were mounted externally on its tiny turret. The Ontos fought in countless skirmishes, but where it became part of Marine legend was in the battle for Hue during the Tet Offensive. There it was involved in some of the fiercest urban fighting in the Corps history. According to one source, the only reason the Fifth Marine Regiment survived Hue was because of the Ontos and the 106mm recoilless rifle.'