Soon after the conclusion of hostilities Monash was appointed Director-General of Repatriation and Demobilisation, heading a newly created department to carry out the repatriation of the Australian troops from Europe. In August 1919, while in London, he wrote a book titled "The Australian Victories in France in 1918", although it was not published until April 1920. He returned to Australia on 26 December 1919 to an enthusiastic welcome. Monash was promoted to the substantive rank of lieutenant-general on 1 January 1920 and returned to the reserves.