Question

Why does Washington need to attack before December 31st?

Answer 1

They need to pass a war bill through Congress that undated us the right to attack

Answer 2

Washington needed to attack before December 31st because the Hessian soldiers would have become alert to face an attack from them after their Christmas and New Year celebrations were over.

Step-by-step explanation:

It was the part of the war strategy formulated by Washington to attack the Hessian army before 31st December. This was because he wanted the Hessians to be engaged in the celebrations of Christmas and New Year which would make it easy for the American troops to defeat them.