Peninsular region in southeast Asia, formerly known as Indochina
  • Cambodia - Territory in southeast Asia, ruled since 1993 by the Preăh Réachéanachâk Kâmpŭchéa
  • Laos - Territory in southeast Asia, ruled since 1975 by the Sathalanalat Paxathipatai Paxaxon Lao
  • Malaysia - Territory in southeast Asia, ruled since 1963 by the Yang di-Pertuan Agong and the Prime Minister of Malaysia
  • Myanmar - Territory in southeast Asia, ruled since 1989 by the Pyidaunzu Thanmăda Myăma Nainngandaw
  • Thailand - Territory in southeast Asia, ruled since 1932 by the Ratcha Anachak Thai
  • Vietnam - Territory in southeast Asia, ruled since 1976 by the Cộng hòa xã hội chủ nghĩa Việt Nam