Possible Clues:

• Country that calls itself the 'Abode of Peace'
• A follower gets hold of King of Galway over a French sultanate
• Land in East, namely, taken back after British period
• Be about to manage one part of Borneo
• Carla goes round eastern sultanate
• Oil-rich country of Southeast Asia
• Ancient character in British island, or part of one
• A sultanate
• Railway engineer's not left in unfinished state
• Nation surrounded by Malaysia