The 31st Reserve Field Artillery Regiment was a field artillery unit of the Southern Brigade Irish Reserve Defence Forces tasked with the defence of part of County Tipperary and also with providing support to the 1st FAR, a unit of the Irish Army.

The Corps of Artillery of the Irish Army was founded in 1924, and based in Connolly Barracks in the Curragh Camp.

The unit had both ceremonial and training commitments, with annual artillery practice held in the Glen of Imaal in County Wicklow in July of each year.

The Pistol Team from 1st Battery was in the forefront of army shooting competitions for some years[citation needed].

In January 2005, members of the 8th FAR (later the 1st Battery) were called upon to take part in a ceremonial 21-gun salute in honour of the City of Cork becoming the European Capital of Culture.

Members were also frequently given opportunity to train on a variety of Reserve Army tasks across the 1st Southern Brigade.