On June 13, 1777, "the Marquis de Lafayette arrives in the American colonies to help in their rebellion against Britain." Here is a short biography of him. From the article:
"When Lafayette learned of the struggle of the Americans in their endeavor to secure their independence he resolved to come to the colonies to aid them in their efforts as a volunteer. He also persuaded several French officers to come with him. Eventually he landed near Charleston, South Carolina, June 13, 1777, and when the leaders learned of his mission they welcomed him very hospitably. Later in the summer he came to Philadelphia and the Congress welcomed him as he came to serve without pay and also as a volunteer. Since he represented the highest rank of French nobility and his motives were so patriotic in the American cause, the Congress commissioned him a Major General on the 31st of July. Later in the summer he met General Washington and a friendship developed between the two men which lasted as long as Washington lived. He was not even 20 years old! During Lafayette's life he never forgot the great American. Lafayette was a member of Washington's staff and during the Battle of the Brandywine, Lafayette participated in the closing part of the battle when he was wounded. Later in the autumn he rejoined the American forces since he had recovered from his wound."