In the latter half of the 17th century further Ottoman designs on Crete caused another protracted period of warfare. The twenty-year Siege of Candia was followed by her involvement in the Great Turkish War, where the Republic briefly regained the Morea, only to return it some years later. The Republic of Venice was finally drawn into European warfare with Napoleon's invasion of Italy; unable to resist his armies, she was forced to surrender and become a French tributary state.