The Accumulated Campaign Service Medal (ACSM) is awarded for 1080 days aggregated service in those theatres for which the GSM (e.g. Northern Ireland, Air Ops Iraq), an OSM (e.g. Sierra Leone or Afghanistan) or the Iraq Medal has been issued. An additional 1080 days is required for the award of the Clasp to the ACSM. More than one Clasp may be earned.
Separate criteria apply to part time members of the Ulster Defence Regiment (UDR) and Royal Irish (Home Service) Regiment.
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