Although largely overlooked by historians, the worldwide Anglican Communion proved to be a major force in mobilising support for the Allied cause throughout the First World War. This article examines the wartime career of Bishop Charles Henry Brent, a Canadian-born bishop of America's Protestant Episcopal Church, who is usually remembered as a missionary, an ecumenist, and as a campaigner against the international opium trade. This article revisits Brent's wartime career, illustrating his three-fold significance as a contemporary symbol of Episcopalian power and influence in the United States, as an epitome of Episcopalian Anglophilia, and as a morale-boosting presence in wartime Britain.