I have been advised by the military authorities that, for the most part, personnel are only deployed within their own brigade area.
Occasionally, personnel from outside Dublin, are deployed for security operations to other locations, including Dublin which is a key centre for large scale operations and ceremonial activity for the Defence Forces. It is important that military personnel have experience of the full range of duties and of being part of a military force in a situation where they may be called upon to reinforce operations in different parts of the country. From time to time, this requires their deployment to locations where that experience can be gained.