The kingdom continued to be a focus of dispute between France and Spain for the next several decades, but French efforts to gain control of it became feebler as the decades went on, and Spanish control was never genuinely endangered. The French finally abandoned their claims to the kingdom by the Treaty of Cateau-Cambrésis in 1559. With the Treaty of London (1557) the new client state of the so-called Presidi ("state of the garrisons") was established and governed directly by Spain, as part of the Kingdom of Naples.