The Battle of Bunker Hill, which actually took place on Breed's Hill in Boston, was the first major battle of the Revolutionary War. Although the Americans lost the battle, they made it a costly victory for the British, because they used the geography of the area to their advantage. The American were supposed to occupy Bunker Hill, but the commander of the Revoltionary Forces decided to take Breed's Hill instead, largely because it had two very steep slopes. The Americans constructed fortifications on top of the hill and waited for the British to attack. The British tried two times to take the hill and were repelled both times because the lesser American force held the high ground and the steep hillsides made progress extremely difficult. Finally, the Americans ran out of ammunition and the British were able to take the hill. However, they suffered over 1000 dead and injured men, while the Americans had only 411 casualities.