Stronghold is a medieval real time strategy series developed by Firefly Studios, first released in 2001, with Stronghold Crusader in 2002 expanding the setting to the Crusades and adding Arabian mercenary units. Those units were given distinct attack and selection voice lines to separate them from English troops. Short unit barks like this one later circulated on soundboards and in gaming videos, where players reuse them outside the game as instant signals for charging, raiding or starting a fight with friends.