For 10 points, name this military retreat during which Mao Zedong rose to the leadership of the Chinese Red Army, and which saw many Communists die of fatigue during its six thousand mile length.
Alfred Bosshardt, a missionary who participated in this event as a prisoner, wrote a first-hand account of this event titled "The Restraining Hand". A German commander named Otto Braun was removed from his position during this event. Crucial moments in this event include the capture of the Luding Bridge. During this event, the Zunyi Conference happened, resulting in a change in leadership. The purpose of this event was to avoid a battle at Rujin, which was deemed unwinnable. It involved leaving Jiangxi Province and moving towards the west and north. For 10 points, name this military retreat during which Mao Zedong rose to the leadership of the Chinese Red Army, and which saw many Communists die of fatigue during its six thousand mile length.
Alfred Bosshardt, a missionary who participated in this event as a prisoner, wrote a first-hand account of this event titled "The Restraining Hand".
Long March [accept: Changzheng]