information:extraction, linguistic:paraphrasing
The Troubles and Irish War of Independence

The various non-state paramilitary groups involved in the 20th-century conflicts in Northern Ireland and the island of Ireland, such as the various Irish Republican Army groups and loyalist paramilitaries, could also be described as militias and are occasionally referred to as such.

The Ulster Defence Regiment (UDR) was a locally raised professional militia instituted by an Act of Parliament in December 1969, becoming operational on 1 April 1970. Created as a non-partisan force to defend Northern Ireland "against armed attack or sabotage", it eventually peaked at 11 battalions with 7,559 men and women. 197 soldiers of the UDR were killed as active servicemen, with a further 61 killed after leaving the regiment, mostly by the Provisional Irish Republican Army. As a result of defence cuts it was eventually reduced to 7 battalions before being amalgamated with the Royal Irish Rangers in 1992 to form the "Home Service Battalions" of the Royal Irish Regiment.