Why did the american army want to control breeds hill??
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Explanation:

If i remember correctly

The Americans had gotten some information about the British wanting to take the hills for a tactical advantage. Of course I think both sides knew the advantage the other side would have if they had control of the hills. They were sent to Bunker Hill and made a mistake and ended up on Breeds hill, closer to where the British were positioned.

Anyways, I think it was more of Americans had to beat the British to it so the British didn't have the upper hand and the British had to take down the Americans, thinking they were going to shoot canons off the hill towards their troops and ships.

Hope this helps a little bit!