Why did the british suffer heavy casualties at the battle of bunker hill

The British suffered heavy casualties at Bunker Hill Battle because they attacked frontally the well defended American front line. Although the final outcome of the Battle was a victory for the British, they suffered  disproportionated losses, amounting to over a thousand men.

the group i'm selecting: greeks.

a first group of greek immigrants came to the us in the 1850s. the second group came to america starting in the 1890s due to economic opportunities they didn't have back in their home caused by the hardships of ottoman rule. greek immigration was 90% male, many of them expected to work and return to greece after earning enough capital, but ultimately had to remain in the us after the greek genocide.

an era of negotiation.

is that an answer to your question?