The United States military essentially operates four powerful air forces – the United States Air Force, the Marine Corps Aviation, the Navy’s aviation wing, and US Army Aviation (which mostly operates helicopters). The Marines have their aviation arm optimized for assault and amphibious operations. The service operates both fixed-wing and rotary-wing aircraft (with the tiltrotor CV-22 Ospreys being something in between those two categories). Here are five fixed-wing aircraft operated by the US Marines.