- Year of entrance into the Union
-
13 Founder States, i.e.
Delaware
Pennsylvania
New Jersey
Georgia
Connecticut
Massachusetts
Maryland
South Carolina
New Hampshire
Virginia
New York
North Carolina
Rhode Island
-
Territorial acquisitions according to the Treaty of Versailles in 1783
-
Territories ceded to France in 1803
-
Land ceded by the U.K. in 1818
-
Land given to the U.K. in 1818
-
Florida lost by Spain in 1819
-
Mexican territories annexed in 1845
-
Territories given by Great Britain in 1846
-
Territories lost by Mexico in 1848-1853
-
Alaska purchased from Russia in 1867
-
Hawaii annexed in 1898
