Nevinson used his experiences in France and at the London General Hospital as the subject matter for a series of powerful paintings which used Futurist and Cubist techniques, as well as more realistic depictions, to great effect. In March 1916 he exhibited his painting "La Mitrailleuse" with the Allied Artists Association at the Grafton Galleries. The artist Walter Sickert wrote at the time that "La Mitrailleuse" 'will probably remain the most authoritative and concentrated utterance on the war in the history of painting.'