The chant comes from Age of Empires II, released in 1999, where priests chant wololo while converting enemy units to the player's civilisation. Players began sharing the sound outside the game because its repetitive rhythm was instantly recognisable and easy to imitate, and it later spread through gameplay videos, remixes and reaction memes. It remains popular because it works as a universal audio cue for persuasion, switching sides and sudden agreement, needing no explanation for anyone who has heard it in a strategy game.