The conquered pays d'en haut: garrisons at Detroit, Michilimackinac and Niagara, behind the Proclamation Line of 1763.
Ceded to the United States in 1783, but the border forts were held until the Jay Treaty evacuation of 1796.
The atlas holds 2 border frames for British Interior — the shape you scrub through changes in 1764 · 1784.
The conquered pays d'en haut — Detroit, Michilimackinac and the interior posts — under British rule after 1763.
The interior post system Britain inherited from New France (broad context).
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