The geography had affected the outcome of the American Revolution, especially the specific geography could surround enemies to get victory during the battles. The effect by the geography had shown in the battles of Bunker Hill, Saratoga, and Yorktown.The battle of Bunker Hill, has took place in the Breed’s Hill, was a good example that affect the American Revolution by geography. After the battle of Lexington and concord, British troops retreated to Boston, turning the isthmus of Charlestown to the North into no man's land, and Dorchester heights to the south into the hands of militias. At the end of May, British forces attempted to break through the siege and began preparations for the operation in Dorchester. The British army sent troops to attack the rebel militia who had climbed up the hill country of Charles town to build a fortification. Although the militia itself is ill-prepared, there is much confusion in its command.