Answer :
On June 17, 1775, early in the Revolutionary War (1775-83), the British defeated the Americans at the Battle of Bunker Hill in Massachusetts. Despite their loss, the inexperienced colonial forces inflicted significant casualties against the enemy, and the battle provided them with an important confidence boost.
The battle received its name thanks to the Bunker Hill in Charlestown, Massachusetts.
Although the British won the battle, and gained control of the Peninsula, they had more casualties than the Americans
Therefore, the colonists escaped to Cambridge over Bunker Hill, and they got intimidated and pessimistic about developing afterward frontal attacks against fortified front lines; so they became more prudent at executing their subsequent combats.