Territorial Expansion
Middle School
Definition
The growth of a country's territory over time through settlement, treaties, purchase, or conquest. In Canada, expansion westward and northward shaped the nation and deeply affected Indigenous peoples.
Worked examples
Canada purchased Rupert's Land from the Hudson's Bay Company in 1869, adding vast western territory to the young nation.
Purchase was one method of territorial expansion that extended Canadian control westward.
British Columbia joined Confederation in 1871 after Canada promised to build a transcontinental railway linking it to the east.
Treaties and negotiation brought new provinces into Canada, expanding its reach to the Pacific.
The numbered treaties (1871–1921) transferred Indigenous lands to the Canadian government, enabling settlement but displacing First Nations.
Territorial expansion often came at the expense of Indigenous peoples' sovereignty and traditional lands.
Common mistakes
- Territorial expansion in Canada was empty land waiting to be settled. → The land was already inhabited by Indigenous peoples with established communities and territories. Expansion displaced Indigenous nations and broke treaty promises, not simply filling vacant space.
- Canada's borders have always been the same as they are today. → Canada grew from four provinces in 1867 to ten provinces and three territories through gradual expansion. Confederation started small; most of the west and north joined later through purchase, treaties, and negotiation.
Where you'll use it next
You'll explore territorial expansion when studying Confederation, the building of the Canadian Pacific Railway, the Métis resistance, treaty rights, and how modern Indigenous land claims stem from broken promises made during expansion.
See also
Fur Trade EraTreaties and PoliciesPre-Contact CulturesBritish Colonial PeriodFrench Colonial EraIndigenous Governance
Reviewed by Pat Cheng, M.Ed. — StudyPug Curriculum Lead · Last updated June 6, 2026