The 2nd/10th Dragoons (short-form: 2/10 D) (in its last incarnation, the 57th Field Artillery Regiment [2nd/10th Dragoons], Royal Canadian Artillery or 57 FD REGT RCA) was a militia regiment of the Canadian Army, based in the Niagara, Wentworth and Brant regions of southern Ontario. It was formed in 1936 by amalgamating the 2nd and 10th Dragoons, both of which had served previously as cavalry units in the Canadian militia. After World War II the regiment was converted into an anti-aircraft artillery unit. In 1962 the regiment was converted into a field howitzer unit and in 1968 amid a downsizing of the Canadian Armed Forces the regiment was reduced drastically before eventually being completely disbanded in the mid-1990s.