The 210th Battalion was authorized in March 1916 in Moose Jaw when Major W.E. Seaborn of the 128th Battalion was promoted to the rank of Lieutenant Colonel, and requested to recruit the 210th Battalion. Recruiting was very popular with the young men of Moose Jaw and district. The new battalion grew very quickly to 521 members. The recruits were accommodated in the Douglas Block on Main St. for summer training of drill and military discipline the battalion moved to Camp Hughes. Owing to the lack of transport, the battalion did not proceed overseas from the camp, but returned to the Douglas Barracks where they underwent further training. On April 12, 1917 the battalion left Halifax on the S.S. Carpathia. A smaller contingent left a week later on the S.S. Northland. The S.S. Carpathia docked at Liverpool on April 22, 1917. The battalion immediately left for Camp Bramshott where they remained as a unit for two weeks. The war situation demanded that the battalion was to be used to provide reinforcements for the hard hit battalions in France. The majority were absorbed into the 46th Battalion and the 1st Canadian Mounted Rifles. Some officers went to the Royal Flying Corps. Casualties of the 210th Battalion serving with the 46th Battalion were 52 killed, 127 wounded, 3 taken prisoner of war. Casualties of those serving in the other units is not available. The 210th Battalion was disbanded and removed from army records.