On 31 May 1866 the infantry and artillery of Canada West (now Ontario) were mobilised, but not the cavalry. The cavalry units were finally mobilised on 2 June 1866 the same day that the Canadian infantry, operating without cavalry for reconnaissance and flank protection, meet the Fenians at Ridgeway. The result of the battle was a Fenian victory. In Quebec, cavalry was properly used at Pigeon Hill where they were able to rout the Fenians and chase them back across the border.
Over the years, four regular British cavalry regiments served in Canada. The last of them (13th Hussars; pictured) served the longest - 3 years in Toronto (1866-1869.) They had the greatest impact on Canadian cavalry as they ran multiple Cavalry Schools until Canada established up its own in 1883.