The United States annexes the Republic of…
1840 CE to 1851 CE
The 1846 Oregon Treaty with Britain leads to U.S. control of the present-day American Northwest.
Victory in the Mexican–American War results in the 1848 Mexican Cession of California and much of the present-day American Southwest.
The California Gold Rush of 1848–49 spurs migration to the Pacific coast, which leads to the California Genocide and the creation of additional western states.
Groups
British North America
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United States of America (US, USA) (Washington DC)
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Britain (United Kingdom of Great Britain and Ireland)
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Oregon Country (claimed by (U.S.A. and Britain)
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Texas, Republic of
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Texas, State of (U.S.A.)
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California Republic
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Mexico, Second Federal Republic of
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California Territory
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Oregon, Territory of (U.S.A.)
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California, State of (U.S.A.)
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New Mexico, Territory of (U.S.A.)
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