This week, defense manufacturers unveiled two separate vehicles each named “Stallion.” The King Stallion, by helicopter giants Sikorsky, is a heavy-lift cargo helicopter. In the future, it could transport troops and vehicles in war zones.

Sikorsky’s King Stallion is the third evolution of the company's Stallion copter. First came the Sea Stallion, which brought troops and vehicles into combat in Vietnam and evacuated the wounded. The Sea Stallion had a long life, with the U.S. Marine Corps finally retiring it in 2012, after first using it in the mid-1960s. The next stage was the Super Stallion, which entered service in 1981. A third engine gave it more carrying power than its predecessor. The Super Stallion has seen service in both Iraq wars, and still serves today.