Fighting

The 7th battalion was organized in Camp Valcartier and composed of recruits from British Columbia, with a strength of 49 officers and 1083 other ranks. The battalion embarked from Quebec City on 25 September 1914, on the troop ship Virginian, and disembarked in the UK on 14 October, and arrived in France on 10 February 1915.

The 6th battalion was organized in Camp Valcartier and composed of recruits from the cavalry units of Manitoba, Saskatchewan and Alberta, with a strength of 45 officers and 1119 other ranks. The battalion embarked from Quebec City on 30 September 1914, on the troop ship Lapland, and disembarked in the UK on 14 October.

The 5th battalion was organized in Camp Valcartier and composed of recruits from the provinces of British Columbia, Alberta, Saskatchewan and Manitoba, with a strength of 44 officers and 1094 other ranks. The battalion embarked from Quebec City on 26 September 1914, on the troop ship Lapland, and disembarked in the UK on 17 October, and arrived in France on 13 February 1915. 

The 4th battalion was organized in Camp Valcartier and composed of recruits from Aurora, Brampton, Brantford, Hamilton, and Niagara Falls, Ontario with a strength of 44 officers and 1121 other ranks. The battalion embarked from Quebec City on 23 September 1914, on the troop ship Tyrolia, and disembarked in the UK on 14 October, and arrived in France on 11 February 1915.

The 3rd battalion was organized in Camp Valcartier composed of recruits from Toronto, Ontario, with a strength of 42 officers and 1123 other ranks. The battalion embarked from Quebec City 25 September 1914, on the troop ship Tunisan, and disembarked in the UK on 16 October, and arrived in France on 11 February 1915.

The 2nd battalion was organized at Camp Valcartier and composed of recruits from Eastern Ontario, with a strength of 44 officers and 1083 other ranks. The battalion embarked from Quebec City on 3 October 1914, on the troop ship SS Cassandra, and disembarked in the UK on 25 October, and arrived in France 11 February 1915. 

The 1st battalion was composed of recruits from Western Ontario, with a strength of 45 officers and 1121 other ranks. The battalion embarked from Quebec on 25 September 1914, on the troop ship Laurentic, and disembarked in the UK on 14 October, and arrived in France 11 February 1915.

The 257th battalion was recruited in Ontario, Quebec, and New Brunswick, and mobilized in Saint John, New Brunswick, with a strength of 29 officers and 902 other ranks. The battalion embarked from Halifax on 17 February 1917, on the troop ship Missanabie, and disembarked in the UK on 26 February.

The 256th battalion was recruited in Ontario and Nova Scotia, to be employed in special railway and bridge building projects, and mobilized in Nova Scotia, Windsor and Toronto, with a strength of 18 officers and 531 other ranks. The battalion embarked from Halifax on 28 March 1917, on the troop ship Missanabie, and disembarked in the UK on 6 April. Arrived in France in June 1917. Constructed and maintained light railways which were used for carrying communication and supplies to the lines and bringing back wounded. Perpetuated by the Algonquin Regiment.

The 255th battalion was recruited in Toronto, east of Roncesvalles Avenue and south of Bloor Street, and mobilized in Toronto, Ontario, with a strength of 13 officers and 248 other ranks. The battalion embarked from Halifax on 2 June 1917, on the troop ship Olympic, and disembarked in the UK on 9 June. The battalion was absorbed by the 12th Canadian Reserve Battalion on 9 June.