On 9 February 1775, the British Parliament formally declared the Massachusetts Colony to be in a state of rebellion, marking a decisive escalation in the growing tensions between the American colonies and the Crown.
This declaration came in response to the colony's defiance of British authority, particularly after events such as the Boston Tea Party and the formation of the Massachusetts Provincial Congress, which openly challenged royal governance.
By branding the colony as rebellious, Parliament effectively sanctioned the use of military force to suppress the insurrection, inadvertently fanning the flames of discontent across the Thirteen Colonies and setting the stage for the American Revolutionary War.