The problems of arson, treason and national security became entangled in the politics of Britain and its Atlantic empire between 1770 and 1777. Fears of French military terrorism were compounded by the increasingly violent resistance of the American colonies. Two dockyard fires in Portsmouth, in 1770 and 1777, and the attack on, and burning of, the royal navy ship Gaspee off Rhode Island in 1772, provoked both legal and political difficulties for the British government. New laws on arson and treason were passed yet proved almost impossible to implement in full outside England.