Age of Empires II, first released in 1999, uses short audio cues to keep players informed during real-time battles without pausing the action. The unit-created cue is one of those functional signals, tied to barracks, stables, and other production buildings completing a recruit. As clips from the game circulated on soundboards and in strategy videos, players began reusing it outside matches as a shorthand for arrival or completion. Its brevity and recognisable game feel help it stay useful in edits long after the original release.