General Washington and his troops spend the winter of 1777-1778 20 miles northeast of Philadelphia at Valley Forge, PA. He was the commander of the continental army.
Marquis de lafayette
He spent part of the winter at Valley Forge and from then on, supported the American cause for Liberty.
Baron Von steuben
The Germans sent him to Valley Forge to help train and hold military drills for the troops. By the spring Washington had a much better prepared army.