Siege of Fort Pitt the territory west of the Appalachian Mountains as they had agreed, the British remained on Native lands and reinforced their forts while settlers continued to push westward. The attacks led by Pontiac against the British in early May 1763, near Fort Detroit, mark what is generally considered to be the beginning of Pontiac's War. The siege of Fort Pitt and numerous other British forts during the spring and summer of 1763 were part of an effort by American Indians to reclaim their territory by driving the British out of the Ohio Country and back across the Appalachian Mountains. While many
Siege of Fort Vincennes it Illinois County in December 1778. In early 1781, Virginia resolved to hand the region over to the central government, paving the way for the final ratification of the Articles of Confederation. These lands became the Northwest Territory of the United States. Siege of Fort Vincennes The Siege of Fort Vincennes (also known as the Siege of Fort Sackville or the Battle of Vincennes) was a Revolutionary War frontier battle fought in present-day Vincennes, Indiana won by a militia led by American commander George Rogers Clark over a British garrison led by Lieutenant Governor Henry Hamilton. Roughly half of Clark's