1781- Battle of yorktown last battle in war. By Tvodraska 1781 1781- yorktown Last of the major battles in the war. 1783- Treaty of ports. Letter that was signed by England and us. saying that England lost, and had give up all land out to Mississippi R. 1787 1787- Constitution is written. rules for running our government. 1789 1789- constitution ratified Approved by all 13 colonies. First presidential election.