First 100 years Timeline By JulianHouston2017 Aug 11, 1776 The Declaration Of Independance It separated the colonists from Great Britian and made it its own country. Aug 11, 1787 The Constitution Created It created the U.S. goverment Aug 11, 1801 John Marshall Becomes Chief Justice of the Supreme Court This is helping improve the goverment branches Aug 11, 1865 The Civil War Ended This aided in the fight to end slavery