The medal index cards and medal rolls refer to codes that tell which theatre of war the man served in.

For disembarkations up to 31 December 1915

These codes generally apply to men who won the 1914 or 1914-15 Star, but not those who only won the British War Medal/Victory Medal pair.

1 Western Europe (France)
2 Balkans (inc Gallipoli)
3 Egypt
4 Africa
5 Asia
6 Australasia

For disembarkations from 1 January 1916

1A France and Belgium
1B Italy
2A Greek Macedonia, Serbia, Bulgaria or European Turkey
2B Gallipoli
3 Russia (up to 1/2 July 1920)
4A Egypt (up to 18/19 March 1916)
4B Egypt (from 18/19 March 1916)
5A East Africa, Nyasaland and Northern Rhodesia
5B South West Africa
5C Cameroon
5D Nigeria
5E Togoland
6A Hejaz
6B Mesopotamia
6C Persia
6D Trans-Caspia
6E South West Arabia
6F Aden
6G Frontier regions of India
6H Tsing-tau
7A New Britain
7B New Ireland
7C Kaiser Wilhelmland
7D Admiralty Islands
7E Nauru
7F German Samoa