Answer:
United States Treaty of Paris, 1783
Louisiana Purchase, 1803
Ceded by Great Britain, 1818
Florida Cession ceded by Spain, 1819-1821
Ceded by Great Britain, 1842
Texas Annexation, 1845
Oregon Country by treaty with Great Britain, 1846
Mexican Cession, 1848
Gadsden Purchase, 1853
Step-by-step explanation:
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