 When Yang Chengwu was political commissar of the 1st Division, Yang Dezhi was commander of the 2nd Division and Yang Yong was political commissar of the 4th Division, all in the 1st Front Army.A decade or so later, Yang Dezhi commanded the 19th Army Group, Yang Chengwu the 20th and Yang Yong the 5th, all in the 2nd Field Army.In Korea, the three fought together as well.