The Rebel's War

This book tells of a possibility-what if the American colonies never won independence in the American Revolution? This story tells the tale of four girls. While they were in the middle of the woods, something strange happens, and they are allowed to time travel. They decide to time travel to the American Revolution (in this timeline, the war is known as the Rebel's War) to change the past and make it so that America won its independence. Will they be able to change the course of history, or is that just wishful thinking?