Hash marks The hash mark is an embroidered diagonal stripe on the lower part of the sleeve. Each mark indicates a period of duty, three years in the Army or four years for naval services. The US Air Force uses a ribbon (to mark four years service) instead of hash marks.
What military slang term for members of the US Marine Corps was derived from a special collar once worn around the neck by both American and British Marines and soldiers from 1798?
The military aeroplanes the F-35 Lightning II Joint Strike Fighter (JSF), the F-22 Raptor, the F-15 Eagle, the F-16 Falcon, the C-17 Globemaster III, the EA-6B Prowler, and the F-111 are powered by engines from which manufacturer?
