Final answer:
The battles of Lexington and Concord took place in Massachusetts Bay and marked the beginning of the American Revolutionary War.
Step-by-step explanation:
The battles of Lexington and Concord took place in Middlesex County, Massachusetts Bay, along the road from Boston to Concord. The American commanders involved in these battles were Colonel James Barrett, Colonel John Buttrick, Dr. Joseph Warren, Captain John Parker, and Brigadier General William Heath.
On April 19, 1775, the first shots of the American Revolutionary War were fired in Lexington, when the British and American forces clashed.
The results of the battles were significant for the American colonies as they marked the beginning of the war and the colonial resistance against British rule.