More than 13,000 years ago a land bridge connecting Asia with North America allowed the first humans to pass from Asia to the Americas.
1000 - Leif Eriksson reaches Canada's Labrador and Newfoundland provinces.
1492 - Christopher Columbus made the first of four voyages to the New World.
1607 - Jamestown was founded in Virginia by the colonists of the London Company.
1620 - November 9, the Mayflower landed at Cape Cod, Massachusetts, with 101 colonists known as Pilgrims.
July 4, 1776 - The Second Continental Congress adopted the Declaration of Independence.
Sept. 17, 1787 - The Constitution is approved. the new Constitution.
1803 - Lewis and Clark set out to explore the Louisana Purchase.
1812 - The war of 1812 confirmed American Independence from the British.
December 28, 1846- Iowa entered the Union as the 29th state.
1861- 1865 The Civil War was fought between the northern and southern states.