Modern tanks are versatile mobile land weapons platforms whose main armament is a large- caliber tank gun mounted in a rotating gun turret, supplemented by machine guns or other ranged weapons such as anti-tank guided missiles or rocket launchers. They are a mainstay of modern 20th and 21st century ground forces and a key part of combined arms combat. Tank designs are a balance of heavy firepower, strong armor, and good battlefield mobility provided by tracks and a powerful engine usually their main armament is mounted in a turret. A tank is an armored fighting vehicle intended as a primary offensive weapon in front-line ground combat.
