Sentence:  On Big Stone Lake near the headwaters of the Red River , Robert Dickson , Superintendent of the Western Indian Department of <WSD>Canada</WSD> , had a trading post and planned in 1818 to build a fort to be defended by twenty men and two small artillery pieces . 
Meaning of the word marked with <WSD> tags:  a nation in northern North America; the French were the first Europeans to settle in mainland Canada