US Revolutionary War By mcmagyar Apr 18, 1775 Battle of Concord Period: Apr 18, 1775 to May 12, 1784 US Revolutionary War Jul 4, 1776 Declaration of Independence Sep 15, 1776 British Seizure of New York Dec 25, 1776 Washington Crosses the Delaware Dec 19, 1777 Arriving at Valley Forge Sep 28, 1781 Siege of Yorktown Begins May 12, 1784 Treaty of Paris