As resistance to European settlement in the Americas, what native ruler, who was referred to by Europeans as King Philip, led an attack across modern-day Massachusetts in which hundreds died on both sides

Metacomet or Metacom

Explanation:

Metacom or Metacomet an elected chief to the Wampanoag people, also known as King Philip, was the second son of the sachem Massasoit. The Wampanoag Indians inhabited in parts of coastal regions (modern-day Massachusetts and Rhode Island).

The war between the indigenous inhabitants of New England and New England colonists called the King Philips War. It was the first Indian War in America to avoid recognizing English authority and stop English settlement. The colonists' ruthless desire for more land on the native lands and the execution of three Wampanoag men by them angered the Native Indians.

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