Please answer the following question: Generate a question about the following movie plot: The main character is Sergeant Michael Dunne (later reverting to his mother's maiden name McCrae for re-enlistment), introduced in the spring of 1917 after Vimy Ridge, a decorated veteran of the 10th Battalion, CEF. During heavy combat in a ruined town, Dunne is wounded and sent home from Europe as a neurasthenia patient. While recovering from his injuries, he meets nurse Sarah Mann (Caroline Dhavernas) in Calgary, Alberta, where he had originally enlisted. Sarah Mann is drummed out of the local nursing service, and ostracised in town, because her father was of German descent and had left Canada to rejoin the Imperial German Army in 1915. He was killed at Vimy Ridge on the opposing side to Sergeant Dunne. She has become addicted to morphine as a means of dealing with the recurring loss in her life. David Mann (Joe Dinicol) is Sarah's younger brother. Despite being ineligible for military service due to asthma, he is desperate to win the respect of his girlfriend's father at a time when military service is demanded of all young men. He is vehemently anti-German and tries to expunge the fact that his father was German, and had died fighting for Germany, from the family history. His girlfriend's father pulls strings to get him enlisted, arguably in the hope that he will not return and marry his daughter. Sarah originally thinks Michael has enlisted David, in his role as local recruitment officer, but later finds this is untrue. The enlistment is further facilitated by a British recruiting officer whose malice and goading of David Mann and Michael Dunne makes him the film's principal antagonist. Michael however feels a responsibility and re-enlists as Private McCrae in order to protect David at the front. As a result, both David and Michael end up in the battlefields of Belgium. Sarah also enlists and follows the 10th ending up as a nurse in triage at an Advanced Dressing Station near the front. The three arrive in Flanders in time for the Battle of Passchendaele. Dunne and Sarah soon meet up again when Dunne...
A:
Who plays the role of Michael Dunne ?