Although Great Britain was unwilling to draw military forces from the war with France, it still enjoyed a naval superiority on the ocean, and vessels of the North America and West Indies Squadron, based at Bermuda, blockaded American ports on the Atlantic throughout the war, strangling the American economy (initially, the north-eastern ports were spared this blockade as public sentiments in New York and New England were against the war). The Royal Navy and Royal Marines also occupied American coastal islands and landed military forces for raids along the coast, especially around the Chesapeake Bay, encouraging enslaved blacks to defect to the Crown and recruiting them into the Corps of Colonial Marines.