Why was the declaration of independence important to the american revolutionary war effort?

The Declaration of Independence was important to the American Revolutionary War effort because it constituted a declaration of principles and a reaffirmation of the will of the colonies to separate from Great Britain.

From the Declaration of Independence, which effectively confirmed the separation of the colonies from Great Britain, many more people joined the patriot cause, while many people stopped supporting the British Crown.

#1 im pretty sure its a.