Marquis de Lafayette gets shot in the leg while organizing retreat in the Battle of Brandywine and George Washington gets him medical help. His bravery makes him become an aide-de-camp to George Washington.
Lafayette goes back to France for more supplies, guns, ships and soldiers for the American colonists. This helped the American army continue to fight against the British.
Lafayette keeps the British in Yorktown, Virginia. This leads to their surrender.
British general, Lord Charles Cornwallis surrenders at Yorktown. This wins them the Revolutionary War.