as part of the Allied Forces in eastern Russia until 19 May 1919. The battalion disbanded on 6 November 1920. Second World War The regiment mobilized as The Three Rivers Regiment (Tank), CASF, for active service on 1 September 1939. It was redesignated as The Three Rivers Regiment (Tank), CAC, CASF, on 13 August 1940. It was converted to armour on 23 November 1940, and to an army tank battalion on 11 February 1941, designated as the 12th Army Tank Battalion (The Three Rivers Regiment (Tank)), CAC, CASF. It was redesignated as the 12th Army Tank Regiment (Three Rivers Regiment (Tank)), CAC, CASF, on 15 May 1942; as the 12th Armoured Regiment (Three Rivers Regiment), CAC, CASF, on 26 August 1943; and as the 12th Armoured Regiment (Three Rivers Regiment), RCAC, CASF on 2 August 1945. On 21 June 1941 it embarked for Britain. The regiment landed in Sicily on 10 July 1943 and in Italy on 12 September 1943 as part of the 1st Canadian Armoured Brigade. On 8 March 1945 the regiment moved with the I Canadian Corps to North-West Europe as part of Operation Goldflake. There it fought until the end of the war. The overseas regiment disbanded on 30 November 1945. Post-war The Regular Force regiment served on peacekeeping duty in CYPRUS as part of OPERATION SNOWGOOSE from August 1990 to March 1991. Afghanistan The Regular regiment provided several reconnaissance squadrons and troops and tank crews to the Canadian Task Forces that served in Afghanistan from 2002 to 2014. History Its origins are in The Three Rivers Regiment, a militia (Reserve Force) regiment based in Trois-Rivières, a town halfway between Montreal and Quebec City. It originally formed in 1871 as the Three Rivers Provisional Battalion of Infantry. This was a new battalion headquarters that united four previously independent infantry companies that had been formed in 1869 at Trois-Rivières, Rivière-du-Loup-en-Haut, Berthier-en-Haut and Saint-Gabriel-de-Brandon. The battalion was given a number in 1880 (86th "Three Rivers" Battalion of Infantry) and raised to regiment status in 1900 (86th Three Rivers Regiment). In the First World War, the Canadian militia infantry units were not mobilized, but instead new units were formed from volunteers from the militia and new recruits. The militia units generally became organizations for recruiting, induction and preliminary training. The 86th Regiment recruited the 178th "Overseas" Battalion, CEF, in 1916. The 178th Battalion was broken up in England in