The Battle of Du-Khang was a protracted siege between the Union of Allied Planets and Independent Planets a year before the end of the Unification War. The 57th Overlanders of the "Balls and Bayonets" Brigade participated in this fight. Sergeant Malcolm Reynolds and Corporal Zoë Alleyne both fought at Du-Khang, as did Tracey. Reynolds already controlled the unit, as he issued orders in the Lieutenant's name and referred to him as a "kid," implying that the officer was new.