1. Australia and Germany, 1914-20. Palau Mariana Islands Marshall Islands German New Guinea

2. Japan and Germany, 1914-20. German New Guinea Bismarck Archipelago Marshall Islands Bougainville

3. Germany and New Zealand, 1914-20. American Samoa Cook Islands Solomon Islands Western Samoa

4. New Zealand and Great Britain, 1901. Cook Islands Norfolk Island Niue Tokelau Islands

5. Australia and Great Britain, 1955. Christmas Island Cocos Islands Heard and McDonald Islands Ashmore and Cartier Islands

6. USA, Germany and Great Britain, 1889-99. Guam American Samoa Western Samoa New Hebrides

7. USA and Spain, 1898-99. Guam Gilbert Islands American Samoa Ellice Islands

8. France and Great Britain, 1906. New Caledonia Fiji Tonga New Hebrides

9. Ecuador and Peru, 1941. Tacna and Arica Atacama Tarapaca Cordillera del Condor

10. Chile and Peru, 1879-1929. Atacama Tacna and Arica Antofagasta Iquique

11. Chile and Bolivia, 1884. Iquique Valparaiso Tarapaca Antofagasta

12. Canada and USA, 1903. Yukon New Brunswick Saskatchewan British Columbia

13. Great Britain and Argentina, 1982. Falkland Islands South Shetland Islands South Sandwich Islands South Orkney Islands

14. Panama and USA, 1999. Panama City Guantanamo Bay Panama Canal Zone Bay of Pigs

15. Cuba and USA, 1925. Isle of Pines Bay of Pigs Guantanamo Bay Santo Domingo

16. USA and Mexico, 1914. Guadalajara Vera Cruz Mexico City Puebla

17. USA and Denmark, 1917. British Virgin Islands American Virgin Islands Aruba Bonaire

18. Honduras and El Salvador, 1969. Swan Islands Navassa Island Corn Islands Gulf of Fonseca Islands

19. Paraguay and Bolivia, 1932-35. Alto Paraguay Asuncion Nueva Asuncion Chaco

20. Colombia and Nicaragua, 1900-1930. San Andres and Providencia Islands Swan Islands Corn Islands Monjes Islands

21. Colombia and Venezuela, 1951-Present. Monjes Islands Aves Island San Andres and Providencia Islands Los Roques Islands

22. USA and Honduras, 1972. Gulf of Fonseca Islands Corn Islands Isla de Pinos Swan Islands

23. Guatemala and Great Britain, 1868-1981. Panama Honduras British Honduras Nicaragua

24. Argentina and Chile, 1985. Falkland Islands Rio de la Plata Puna de Atacama Beagle Channel

25. Great Britain and Nicaragua, 1905. Panama Canal Zone Managua Mosquito Coast British Honduras