Varley came to the attention of Lord Beaverbrook, who arranged for him to be commissioned as an official war artist. He accompanied Canadian troops in the Hundred Days offensive from Amiens, France to Mons, Belgium. His paintings of combat are based on his experiences at the front. Although he had been enthusiastic to travel to France as a war artist, he became deeply disturbed by what he saw, saying "We’d be healthier to forget [the war], and that we never can. We are forever tainted with its abortiveness and its cruel drama."
