Why was Cornwallis not able to get the reinforcements that he was expecting?

Explanation:

On October 19, 1781, British General Charles Cornwallis surrendered his army of some 8,000 men to General George Washington at Yorktown, giving up any chance of winning the Revolutionary War. ... The Franco-American siege exhausted the British army's supplies of food and ammunition.

in which two ways were the northeast woodland indians and the southeast indians similar? both collaborated to form the iroquois confederacy. both cultivated the crops of corn, beans, and squash. both lived in rich environments of swamps and rivers. both lived in tree-bark dwellings called wigwams. both expected men to hunt, while women farmed.

we need the map to answer the question