 PAM was not directly mobilized during World War I; with Canadian soldiers serving overseas enlisting the Canadian Expeditionary Force (CEF), a separate force managed by the Ministry of Overseas Military Forces.However, the Royal Canadian Regiment, an infantry regiment under PAM, was deployed to Bermuda in order to relieve the 2nd Battalion, The Lincolnshire Regiment from garrison duty.The members of the regiment were later redeployed to France in November 1915, where its members were integrated with the CEF.