The Defence Forces are the armed forces of Ireland. They encompass the Army, Air Corps, Naval Service, and Reserve Defence Forces.

The Irish Army, also known within Ireland simply as the Army, is the land component of the Defence Forces of Ireland. The Irish Army has an active establishment of 7,520, and a reserve establishment of 3,869. Like other components of the Defence Forces, the Irish Army has struggled to maintain strength and as of April 2023 has only 6,322 active personnel, and 1,382 reserve personnel. The Irish Army is organised into two brigades.