China's medium attack helicopter — a tandem-seat, twin-engine design built around the indigenous WZ-9 turboshaft, fielded by the PLA since 2009 and exported as the Z-10ME.
The Mil Mi-24 Hind is a uniquely configured Soviet/Russian attack helicopter that combines a heavy gunship with an 8-troop transport compartment — the most combat-used rotary-wing type in history and still in production as the Mi-35M.
Russia's coaxial-contra-rotating attack helicopter — the heavily armed side-by-side two-seat Alligator has become the most prolific and most-attrited rotary-wing platform of the Russo-Ukrainian war.
Russia's dedicated tandem-seat attack helicopter — a heavily armored, night-capable anti-armor platform armed with the Ataka missile, now seeing modernized Mi-28NM variants with longer-range munitions in Ukraine.
Europe’s multinational attack helicopter — the Airbus Tiger is a twin-engine, tandem-seat platform that combines a chin-mounted cannon, anti-tank missiles, and a mast-mounted sight to give France, Germany, and Spain an anti-armour, fire-support and reconnaissance capability.
The Bell AH-1Z Viper ("Zulu Cobra") is the US Marine Corps' marinized attack helicopter — a twin-engine, tandem-seat platform built for close air support, armed escort, and anti-armor missions from amphibious shipping and expeditionary airfields.
The Boeing AH-64 Apache is the United States’ premier attack helicopter — a twin-engine, tandem-seat anti-armor and close-air-support platform that has anchored U.S. Army rotary-wing combat power since Desert Storm.