Let's get the rest of the troop to hide in the trees for the ambush.
The Fight for Freedom
Since the Continental army was fighting on their home ground, they knew more about the area. Perfect opportunities of ambushes and what the called "guerilla warfare".
Messy / Unorganized
The colonists put everything on the line while fighting in the war. Passion was the emotion really driving them to want to win the war so badly.
The French were seeking revenge on the British because of their detrimental loss in the French and Indian war. The Continental army formed an alliance with France. In return, France gave them loans, naval support, and troops.