How long did billy bishop serve World War 1 hero?

Billy Bishop served in World War I from 1915 to 1919. He initially joined the Canadian Expeditionary Force before transferring to the Royal Flying Corps, where he became one of Canada's top flying aces. Over his service, he achieved 72 confirmed aerial victories and was awarded the Victoria Cross for his bravery. His contributions significantly impacted the air warfare tactics of the time.