In the Warhammer 40,000 universe, the Tau are a fictional alien race. They are a technologically advanced species with a strong emphasis on unity and cooperation, and they possess a strong desire to expand their civilization and bring other races into their fold through diplomacy rather than force. They are known for their powerful ranged weaponry and advanced technology, as well as their use of armored battlesuits. They are one of the main factions in the Warhammer 40,000 universe, and are often in conflict with the Imperium of Man and other factions in the game.