Service: US Army Armament: 30 mm M230 Chain Gun ... obscured battlefield and adverse weather conditions. The AH-64 Apache is the Army's heavy division/corps attack helicopter.

What You Need to Know: The U.S. Army plans to extend the service life of its AH-64 Apache attack helicopters into the 2070s by implementing significant upgrades ...

And the US Army AH-64 Apache and Russian Ka-52 Alligator are generally considered to be the two best military attack helicopters in the world (with the Russian Mi-28N arguably in a close third).