they had more troops and the british were loosing there troops so that's my answer.
the peopple who helped Washington win Yorktown were... -john paul Jones -
The Americans
Yes
they fight.
The French helped the Continental army surrond Yorktown and trap the British.
The battle at Yorktown.
They were determined to win the war.
French.
the surrender of cornwallis's army
The French Navy's assistance.
The french joined forces with the Americans in the battle of Yorktown. This is the most likely reason for the battle ending in surrender.
The French generals and his spirt to win.