The war between the English colonists and the Wampanoag Confederacy began when: A. the Wampanoag leader Metacom declared war on the colonists. OB. a group of Wampanoag men attacked a rival group of Narragansett peoples. C. the colonists formed an alliance with the rival Narragansett peoples. OD. the colonial government executed the Wampanoag leader Metacom.