In late December 1778, the British had captured Savannah. In 1780 they launched a fresh invasion and took Charleston as well. A significant victory at the Battle of Camden meant that the invaders soon controlled most of Georgia and South Carolina. The British set up a network of forts inland, hoping the Loyalists would rally to the flag. Not enough Loyalists turned out, however, and the British had to move out. They fought their way north into North Carolina and Virginia, with a severely weakened army. Behind them, much of the territory they left dissolved into a chaotic guerrilla war, as the bands of Loyalists, one by one, were overwhelmed by the patriots.