 Bart enlists Nelson 's other victims in his army and trains them for combat . Herman commands from Bart 's treehouse as Bart leads his forces into battle . <unk> Nelson and his sidekicks , they commence saturation bombing with water balloons . Nelson 's thugs surrender , and Nelson is taken prisoner . He threatens to beat up Bart as soon as he is untied . Herman drafts the armistice treaty , which states that Nelson will retain his position and name , but will not hold any actual power . Then , Bart and Nelson sign the treaty . Then , Marge enters with cupcakes , and peace prevails . 
