Final answer:
The American colonists' armed gathering on the Lexington green was an exemplification of the Minutemen's readiness and signified the commencement of the American Revolutionary War.
Step-by-step explanation:
When the American colonists gathered on the village green outside of Lexington armed and ready for confrontation as the British marched to seize weapons and capture leaders of the Sons of Liberty, this exemplified the Minutemen's response and the burgeoning colonial resistance that would escalate into the American Revolutionary War. These Minutemen vowed to be ready at a moment's notice, and their quick assembly in defense against the British demonstrated this commitment. The subsequent exchange of fire marked the beginning of the conflict and signaled the colonial willingness to defend their liberties.