A flower war or flowery war was a ritual war fought intermittently between the Aztec Triple Alliance and its enemies on and off for many years in the vicinity and the regions around the ancient and vital city of Tenochtitlan, probably ending with the arrival of the Spaniards in 1519. Enemies included the city-states of Tlaxcala, Huejotzingo, and Cholula in the Tlaxcala-Pueblan Valley in central Mexico. In these wars, participants would fight according to a set of conventions.

Ritual warfare is a state of continual or frequent warfare, such as is found in some tribal societies.