Final answer:
The Battles of Lexington and Concord were the first engagements of the American Revolution. The Battle of Lexington happened first and it was a British victory, followed by the Battle of Concord, which was an American victory.
Step-by-step explanation:
The Battles of Lexington and Concord were the first military engagements of the American Revolution, which took place in 1775. The battle of Lexington happened first where the British troops encountered the colonial militia, known as Minutemen. It ended in a British victory. This was followed by the battle of Concord, where the militias and local volunteers successfully defended their ammunition stores, resulting in an American victory.