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OC
Abbreviation:Officer Commanding
OC
Abbreviation:Oifigeach i gCeannas
ONUCA
Acronym:United Nations Observer Group in Central America
ONUCA
Acronym:Grúpa Breathnóireachta na Náisiún Aontaithe i Meiriceá Láir
ONUSAL
Acronym:United Nations Observer Mission in El Salvador

United Nations Observer Mission in El Salvador

OP
Acronym:Observation Post
OSCE
Acronym:Operation for Security and Co-Operation in Europe

Operation for Security and Co-Operation in Europe

OSGA
Acronym:Office of the Secretary General in Afghanistan
OTW
Abbreviation:Officer Training Wing

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Cap Badge Design

The Badge Design

The Badge design (common to all Corps and Services and all orders of dress) is derived from the badge of the Irish Volunteers and was designed by Professor Eoin MacNeill, Chairman of the National Executive of the Irish Volunteers. This badge was originally adopted by the Irish Volunteers in October 1914. [Read more]