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The base was used as a training centre by the Ulster Defence Regiment whose 3rd (County Down) Battalion was also based there.
In 1978 Dessie O'Hare and McGinn killed Thomas Johnston, a former member of the Ulster Defence Regiment (UDR) in Keady, South Armagh.
RUC SPG officer John Weir, in his affidavit made to Irish Supreme Court Justice Henry Barron, named those involved in the Reavey shootings as Robert McConnell (a soldier of the British Army's Ulster Defence Regiment), Laurence McClure (an RUC SPG officer), James Mitchell and another man.