Final answer:
The Crown took more land from the Mississauga First Nations than initially promised during the Toronto Purchase in 1805, which was part of the broader land acquisitions and treaties in the colonization of Canada. The Dominion of Canada was created in 1867 to support defense and the construction of the Canadian Pacific Railroad, completed in 1885.
Step-by-step explanation:
During the Toronto Purchase in 1805, the Crown took more land from the Mississauga First Nations than it had indicated and ended up purchasing most of present-day Toronto. This acquisition was part of a series of land transactions and treaties that occurred between European settlers and Indigenous populations as Canada was being colonized and established. Notably, the Dominion of Canada, formed in 1867 under the British North America Act, included the Province of Canada (Ontario and Quebec), Nova Scotia, and New Brunswick with the aim of facilitating national defense and building a transcontinental railroad. The vision of Canada's first Prime Minister, Sir John A. Macdonald, eventually led to the creation of the Canadian Pacific Railroad completed in 1885, confirming the importance of such infrastructure in uniting the country's eastern and western coastal regions.