After three months serving as commander of the Cavalry Corps, beginning in May 1915, at which time he was also made a temporary lieutenant-general, Byng was off to Gallipoli to head the IX Corps and supervise the successful British, Australian, and New Zealand forces withdrawal from the ill-fated campaign. For this, he was on 1 January 1916 elevated within the Order of the Bath to the rank of Knight Commander, but was not allowed much rest, as he spent the next month commanding the Suez Canal defences before returning to the Western Front to lead the XVII Corps. By June, he was in command of the Canadian Corps and was promoted when, for distinguished service, the King made substantive Byng's rank of lieutenant-general. Byng's greatest glory then came when he, along with his subordinate officer, the Canadian Major-General Arthur Currie, led the Canadian victory in April 1917 at the Battle of Vimy Ridge, an historic military milestone for the Dominion that inspired nationalism at home.