The British won the battle with a great loss. The British took bunker hill from the Colonials but suffered 1,054 casualties (226 dead and 828 wounded) most of them being officers. The colonials lost about 450 with 140 being killed.
The imperialists needed workers to work on the land that was colonized. The locals were not an option because they were often either insubordinate, or they were protected by the law. That's why having slaves to work in those colonies was great, which is why they got them from Africa.
