The Story of the 21st - Being the Official History of the 21st Bn AIFUnit history in downloadable PDF format (10MB). The 21st Battalion arrived in Egypt in June 1915 and proceeded to Gallipoli in late August. In early May 1917, the battalion fought at Bullecourt, and then in October participated in the 3-kilometre advance that captured Broodseinde Ridge, east of Ypres. The 21st battalion participated in the battles - Hamel, Amiens and Mont St. Quentin. The 21st could barely muster a company after the 1918 offensive. It was ordered to disband and in response, the men of the 21st mutinied on 25 September 1918. By the end of that day, the order was withdrawn, and the battalion fought its last battle at Montbrehain on 5 October. The following day it became the last Australian battalion to withdraw from active operations on the Western Front. To order the ebook and download click on the Add to Cart button.