A glossary of military-based abbreviations, acronyms and initials used throughout the First World War, the Second World War and through to present day. The abbreviations are associated with various different nations, primarily the United Kingdom but also including, India, South Africa, USA, New Zealand and Australia. Abbreviations also have a strong focus on various armed forces such as the British Army, Royal Navy and Royal Air Force. Use the browse prefix below to navigate to glossaries beginning with a specific letter.
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Abbreviation
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Definition 1
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Definition 2 (if applicable)
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IA
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Indian Army
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IAMC
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Indian Army Medical Corps
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IAOC
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Indian Army Ordnance Corps
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IARO
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Indian Army Reserve of Officers
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IASC
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Indian Army Service Corps
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IBC
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Indian Bearer Corps
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I/C
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In Charge Of
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IEAMS
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Imperial East African Medical Service
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IF
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Independent Force (RAF)
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I GDS
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Irish Guards
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IGH
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Indian General Hospital
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ILH
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Imperial Light Horse (South African)
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IMD
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Indian Medical Department
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IND
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Indian
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IND LAB COY
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Indian Labour Company
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INF
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Infantry
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INFY
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Infantry
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IOD
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Indian Ordnance Department
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IOR
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Indian Other Rank
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IR
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Irish
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IRCS
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Imperial Rest Camp Staff
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IR GDS
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Irish Guards
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IRO
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International Refugee Organisation
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ISC CPS
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Imperial Service Camel Corps
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ISF
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Indian State Forces
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ISTC
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Indian Supply Transport Commissariat
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ITC
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Infantry Training Centre
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ITW
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Initial Training Wing
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IWGC
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Imperial War Graves Commission
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IWT
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Inland Water Transport
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