Aerial rocket artillery is a type of armed helicopter unit that was part of the artillery component of the United States Army's two airmobile divisions during the Vietnam War. Controlled by division artillery and not the aviation group, the 2nd Battalion, 20th Artillery, 1st Cavalry Division and the 4th Battalion, 77th Artillery, 101st Airborne Division, along with Battery F, 79th Artillery, 1st Cavalry Division, were the only ARA units fielded during that conflict. The ARA concept disappeared from Army aviation by the mid-1970s, replaced by more generic attack aviation units.

The Mk 4 Folding-Fin Aerial Rocket (FFAR), also known as "Mighty Mouse", is an unguided rocket used by United States military aircraft. It was 2.75 inches (70 mm) in diameter. Designed as an air-to-air weapon for interceptor aircraft to shoot down enemy bombers, it primarily saw service as an air-to-surface weapon. The FFAR has been developed into the modern Hydra 70 series, which is still in service.