The sound comes from Marvel's Black Panther (2018), where the warriors of Wakanda charge into battle with a rhythmic chant backed by drums and percussion. The film's battle sequences turned the cry into a symbol of unity and defiance, and clips of it spread quickly across meme pages, gaming montages and football fan edits. Known on German soundboards as the Wakanda Schlachtruf, it is still dropped into videos whenever a moment needs the energy of an army standing together.