Many RMC alumni have served Canada in war and peace. Billy Bishop was a leading ace of the First World War, won the Victoria Cross and helped to create the Canadian Flying Corps. Charles Merritt was a lawyer and militia officer who won the Victoria Cross at Dieppe during the Second World War. Leonard Birchall, the "Saviour of Ceylon", discovered the approach of the Japanese fleet during the Second World War and showed courage and leadership as a prisoner of war in Japan. Ex-cadets also helped with the peace process. John de Chastelain was twice Chief of Defence Staff and helped to monitor the Peace Accords in Northern Ireland. Romeo Dallaire headed the United Nation forces in Rwanda. Many former cadets gave their lives during both world wars, and in Afghanistan.