Foot Clan
In the "City at War" storyline ("Teenage Mutant Ninja Turtles" (vol. 1) #50-62), a feud between various factions of the Foot Clan over leadership breaks out. As fighting ensues in the streets of New York, the Turtles and the civilian populace get caught in the middle. Leonardo grows weary of constant battle with the Foot Clan and seems fraught with indecision. The Turtles are approached by Karai, the leader of the Foot Clan in Japan who has come to New York to unite the Foot. She presents the Turtles with an offer of a truce between the Foot and the Turtles if they help her kill Shredder's Elite Guards, which are a major obstacle to her reorganizing the Foot. Despite Raphael's objections, Leonardo persuades his brothers to accept Karai's offer and all four Turtles successfully work with Karai to eliminate the Elite Guard.