How was the federation reorganized in 1867?

In 1867, the federation was reorganized through the passage of the British North America Act, which created the Dominion of Canada. This act united the provinces of Ontario, Quebec, New Brunswick, and Nova Scotia into a federal system, granting them a degree of self-governance while maintaining British oversight. The reorganization aimed to improve governance, enhance economic cooperation, and provide a stronger defense against external threats. This new structure established a parliamentary system and laid the groundwork for further expansion and the inclusion of additional provinces and territories.