Part+B.

1776- The Declaration of independence drafted by Thomas Jefferson, Formally adopted at the second continental congress by all rebel states. In June, the Congress had adopted a resolution that:

"These United Colonies are, and have the right to be, free and independent states."

1781- The Articles of Confederation came into operation.

1787- The constitution of the United states was adopted by the Constitutional Convention.

1788- New Hampshire was the 9th state to accept the Constitution, which became the law.

1791- "The Bill of rights" was adopted.

1791 Vermont admitted

1792 Kentucky admitted

1793 Fugitive Slave act

1796 Tennessee admitted

1803 Ohio admitted

1803 Louisiana Purchase

1804-1806 Lewis and Clarke Expedition

1812 Louisiana admitted

1812 War of 1812

1816 Indiana admitted

1817 Mississippi admitted

1818 Illinois admitted

1819 Alabama admitted

1820 Maine admitted

1820 Missouri Compromise

1821 Missouri admitted

1822 Stephen Austin founds colony in Texas

1834 Indian Territory founded

1836 Arkansas admitted

1836 nbsp Texas Revolution

1837 Michigan admitted

1840-1860 Oregon Trail

1845 Florida admitted

1845 Texas admitted

1846 Iowa admitted

1848 Wisconsin admitted

1850 California admitted

1850 Utah and New Mexico Territories

1853 Gadsden Purchase

1854 Nebraska and Kansas Territories