An Chéad Chathlán Coisithe (English: The First Infantry Battalion) was established as an Irish language speaking unit in Galway in 1924.

[2] All the armed forces units except An Chéad Cathlán functioned exclusively through the medium of the State's second official language (English).

The then Minister for Defence, Mr O'Toole (on 4 December 1986) presented details regarding the recruitment of native Irish speakers to An Chéad Chathlán.

[3] Under the 'Defence Forces [sic] Scheme' 2006-2009 ( under Section 11 of the Official Languages Act 2003) Óglaigh na hÉireann have undertaken to improve the delivery of services in Irish to the public.

Irish air corp are acting in a capacity which is representative of the State, Government or, where appropriate, contractor personnel, providing a service on behalf of Óglaigh na hÉireann.