When Mercs Collide is a Star Wars crossover story which involves an incident during different time periods. The incident sends Captain Rex, Delta Squad, and Luke Skywalker to the universe of Mercenaries, or, more specifically, North Korea in 2010. It's a well-found universe, and focuses on the storylines of Mercenaries, Mercenaries 2, Star Wars: Republic Commando, Star Wars: The Clone Wars, and the Original Trilogy.