On the 18th April 1997 the 5th Infantry Battalion vacated a piece of Irish history. Up to this, Collins Barracks, Dublin held the record for being the oldest continually occupied military barracks in the world, and at one time housed 5,000 troops.  An RTÉ News report broadcast on 18 April 1997. The reporter is Paul Cunningham.

https://www.rte.ie/archives/2017/0406/865679-army-departs-collins-barracks-dublin/