Hearts of Iron IV, released by Paradox Interactive in 2016, is a grand strategy game set in the Second World War era in which players guide nations through diplomacy, industry and warfare. Factions are central to that system, with countries joining blocs such as the Allies, Axis or Comintern for protection and shared wars. The join-faction cue therefore marks a recognisable turning point for players, and clips of it have circulated in gameplay videos, streams and strategy memes, where its formal, official tone is reused to joke about real or fictional alliances forming.