Le Régiment de la Chaudière originated in Saint-Anselme, Quebec, on 9 April 1869, as The Provisional Battalion of "Dorchester". It was redesignated as the 92nd "Dorchester" Battalion of Infantry on 12 June 1885. On 1 August 1899, it was amalgamated with the 23rd "Beauce" Battalion of Infantry but retained the same designation. It was redesignated as the 92nd Dorchester Regiment on 8 May 1900; as Le Régiment de Dorchester on 29 March 1920; as The Beauce Regiment on 15 March 1921; as Le Régiment de Beauce on 1 May 1921; and as Le Régiment de Dorchester et Beauce on 1 February 1932. On 15 December 1936, it amalgamated with the 5th Machine Gun Battalion, CMGC and was redesignated as Le Régiment de la Chaudière (Mitrailleuses). It was redesignated as the 2nd (Reserve) Battalion, Le Régiment de la Chaudière (Mitrailleuses) on 7 November 1940; as the 2nd (Reserve) Battalion, Le Régiment de la Chaudière on 1 April 1941; and as Le Régiment de la Chaudière on 24 April 1946. On 1 September 1954, it was amalgamated with Le Régiment de Lévis but retained the same designation.

The 23rd "Beauce" Battalion of Infantry originated in Sainte-Marie, Quebec, on 9 April 1869. On 1 August 1899, it was amalgamated with the 92nd Dorchester Battalion of Infantry.

Le Régiment de Lévis originated in Lévis, Quebec, on 1 December 1902, as the 17th Regiment of Infantry. It was redesignated as Le Régiment de Lévis on 29 March 1920; as the 2nd (Reserve) Battalion, Le Régiment de Lévis on 12 May 1942; and as Le Régiment de Lévis on 7 November 1945. On 1 September 1954, it amalgamated with Le Régiment de la Chaudière.

The 5th Machine Gun Battalion, CMGC originated in Quebec City, Quebec, on 1 June 1919, as the 5th Machine Gun Brigade, CMGC. It was redesignated as the 5th Machine Gun Battalion, CMGC on 15 September 1924. On 15 December 1936, it amalgamated with Le Régiment de Dorchester et Beauce.