The First English Civil War (1642-1651) was a conflict between the forces loyal to King Charles I and those supporting the Parliament. The war arose from disputes over governance, religion, and the king's authority. It marked a significant struggle for power in England, leading to battles across the country. The war began in 1642 and saw major battles, including the Battle of Edgehill and the Battle of Marston Moor. Ultimately, the conflict ended in 1646 with the defeat of the royalist forces. This war set the stage for further conflicts and significant changes in the English political landscape.