Canadian Siberian Expeditionary Force

The Canadian Siberian Expeditionary Force (French: Corps expéditionnaire sibérien) (also referred to as the Canadian Expeditionary Force (Siberia) or simply the CSEF) was a Canadian military force sent to Vladivostok, Russia, during the Russian Revolution to bolster the allied presence, oppose the Bolshevik Revolution and attempt to keep Russia in the fight against Germany. Composed of 4,192 soldiers and authorized in August 1918, the force returned to Canada between April and June 1919.

Source: Wikipedia — Canadian Siberian Expeditionary Force (CC BY-SA 4.0)