The Sussex Military Camp, frequently shortened to Camp Sussex, was a training facility for the Permanent Active Militia and Non-Permanent Active Militia, later known as the Canadian Army. It was located on the southeastern edge of the town of Sussex, New Brunswick.
Camp Sussex was established in May 1885 when New Brunswick militia units assembled in a large tented camp at the site south of the Intercolonial Railway mainline to prepare for service in the North West Rebellion. Few permanent buildings were constructed, although a large area of forest and farm land was cleared on the flat floodplain in the Kennebecasis River valley.
During World War I, Camp Sussex hosted the First Training Battalion of the New Brunswick Regiment, later renamed the 1st Depot Battalion in 1918.
The start of World War II saw the 3rd Canadian Infantry Division authorized in 1940 under the command of Major-General E.W. Sansom. The army decided to concentrate the 3 CID in the Maritimes and one of the areas selected was Camp Sussex. The camp was enlarged to handle a brigade with units arriving that fall for training. After the 3 CID units departed for overseas deployment, they were replaced by units from the 4th Canadian (Armoured) Division. Following deployment of the 4 CID, the 17th Infantry Brigade of the 7th Canadian Infantry Division began to use the training facilities; the 7 CID being the general reserve for Atlantic Command. In April 1943 the 17th Infantry Brigade consisted of the Victoria Rifles of Canada, The Dufferin and Haldimand Rifles of Canada and Les Voltigeurs de Québec. The A-34 Special Officer's Training Centre was established at Camp Sussex from 1944-1945 to train officers for the CANLOAN program