What caused the Massachusetts' to form a militia?

The Massachusetts militia was formed primarily in response to growing tensions between the American colonists and British authorities in the years leading up to the American Revolution. Key events, such as the Intolerable Acts and the increasing presence of British troops, heightened fears of oppression and loss of rights among colonists. Local leaders recognized the need for organized defense against potential military actions by the British, prompting the establishment of a militia for protection and to assert colonial rights. This culminated in the mobilization of the militia for the battles of Lexington and Concord in April 1775.