Wololo comes from Age of Empires II, first released in 1999, where priests chant it while converting units for the player's civilisation. The sound became a running joke among players because the conversion mechanic could swing battles, and clips of the chant spread through gameplay videos, streams and meme edits. It later crossed into wider internet culture as shorthand for persuasion or flipping loyalty, kept alive by remasters of the game and by creators reusing the instantly familiar chant in unrelated videos.