With the outbreak of World War I in August 1914, the Kennedy Regiment was the first Australian military unit mobilised when 500 men volunteered for overseas service and were sent to garrison Thursday Island due to concerns of German military action in the Pacific.Scott 1941, pp. 196–198. This force then joined the Australian Naval and Military Expeditionary Force for the invasion of German New Guinea, however, when the task force reached Port Moresby, their commander, Colonel William Holmes decided to leave them there as garrison troops as it was felt that they were not ready for combat.Grey 2008, p. 87. The detachment was subsequently sent back to Townsville and subsequently played no further part in the war as it was decided not to deploy the militia units overseas, but rather to raise a separate force for overseas service known as the Australian Imperial Force. Despite this, many members of the Kennedy Regiment enlisted in the AIF, most of them, including the battalion's commanding officer Lieutenant Colonel Frederick Toll, joining the 31st Battalion which was raised at Enoggera in Brisbane as part of the 8th Brigade in August 1915.
