Part+A.

1787 --- We acquired the Territory Northwest of Ohio. Pennsylvania was established as a state. New Jersey was established as a state. Delaware was established as a state.

1788 --- Virginia was established as a state. Georgia was established as a state. South Carolina was established as a state. North Carolina was established as a state. Maryland was established as a state. New York was establish as a state. Connecticut was established as a state. New Hampshire was established as a state. Massachusetts was established as a state.

1790 --- We acquired the Territory South of Ohio. Rhode Island was established as a state.

1791 --- Vermont was established as a state. Washington D.C. was established.

1792 --- Kentucky was established as a state.

1796 --- Tennessee was established as a state.

1798 --- The Territory South of Ohio was divided into the Territory South of Ohio and the Mississippi Territory.

1800 --- The Territory Northwest of Ohio was divided into the Territory Northwest of Ohio and the Indiana Territory.

1803 --- We acquired the Louisiana Purchase.

180? --- The Territory Northwest of Ohio and the Indiana Territory were divided into the Michigan Territory, the Indiana Territory, and the Illinois Territory. Ohio was established as a state.

1812 --- Louisiana was established as a state. The Louisiana Purchase was renamed to the Missouri Territory.

1816 --- Alabama was established as a state.

1817 --- Mississippi was established as a state.

1818 --- We acquired the Arkansas Territory. Illinois was established as a state. Indiana was established as a state.

1820 --- Maine was established as a state.

1821 --- Missouri was established as a state. The Missouri Territory became Unorganized Territory.

1822 --- We acquired the Florida Territory.

1836 --- Arkansas was established as a state.

1837 --- Michigan was established as a state.

1838 --- We acquired the Wisconsin Territory. We acquired the Iowa Territory.

1845 --- We acquired the Texas Annexation. Florida was established as a state. Texas was established as a state.

1846 --- Wisconsin was established as a state. Iowa was established as a state.

1848 --- We acquired the Oregon Territory.

1849 --- We acquired the Minnesota Territory.

1850 --- We acquired the Utah Territory. We acquired the New Mexico Territory. California was established as a state.

1854 --- We acquired the Nebraska Territory. We acquired the Kansas Territory.