The US Army’s AH-64 Apache attack helicopter (originally built by Hughes Helicopters from 1975 to 1984, followed by McDonnell Douglas from 1984 to 1987, and Boeing ever since), is arguably the most effective and battle-proven helicopter gunship of all-time. Playing devil’s advocate, one could also reasonably make a case for either the Soviet/Russian-made Mi-24 “Hind” or the American-made AH-1 Cobra, but that’s a debate for a future Simple Flying article.