The next year the militia artillery across Canada was reorganized and the brigade's name was changed to 15th Field Brigade, Royal Canadian Artillery. When the brigade was created they were supplied with guns by the Canadian Army but not with horses to move them. For their first exercises the gunners had to borrow horses to pull their guns. In June 1928 in order to save money and increase their range, the 5th Battery of the 15th Brigade became one of the first Canadian militia artillery units to experiment with towing guns using trucks. The exercise of 9 June, commanded by Major J.G. Chutter, had the four 60-pounders of the 5th Battery towed by four International trucks. Major Chutter's report at the end of the exercise showed that use of trucks was much less expensive than using horses and that they were able to accomplish three times the training. Throughout the 1920s and 1930s the brigade's training during the year lead towards a summer training camp. The camps where held in different locations, such as Hastings Park in Vancouver and Sarcee Camp in Alberta. In the mid-1930s the Government of Canada began to take a serious look at the defence of the west coast of Canada. The Empire of Japan had a growing influence over the Pacific and the idea of a war between Canada's allies, the United Kingdom and the United States, with Japan seemed a likely scenario. In 1936 Major B.C.D. Treatt of the Coast Artillery School in England was asked to make recommendations for the defence of the west coast of British Columbia from an attack by sea. In his report Major Treatt made many recommendations including the creation of four new coastal artillery forts to guard the Port of Vancouver. The forts were located in such a way as to stop any ship or submarine from passing into Burrard Inlet. There was also a fort in the Strait of Georgia to prevent ships from approaching Vancouver from the north. After the war began another fort was built to assist in the inspection of ships entering the Fraser River at Steveston. In 1937 Parliament approved the construction of the forts but had not decided who would man the guns in the event of war. In World War I members of the Naval Reserve and reservists from Cobourg, Ontario, had manned the coastal defence batteries in Vancouver. In spring 1938 it was decided that members of the Canadian Militia would man them and the 15th Brigade was assigned as coast defence artillery, becoming the 15th Coast Brigade, RCA. A year later in May 1939 the 68th Battery and the 5th Battery were detached to become the 1st Anti-Aircraft Regiment, RCA, to protect Vancouver from attacks from the air.