In June 1779, British forces had arrived in Penobscot bay in Maine, and began to set up fortifications in anticipation of establishing a new colony there. Over the course of July and August the Continental army attempted to drive them out, until on August the 12th they launched a naval attack. However, a British relief fleet arrived and attacked the American ships, and the American Navy sustained huge losses as they were driven up the Penobscot River.