[1] The barracks are named after a Sergeant Custume, who defended the bridge from the forces of King William III during the 1690 Siege of Athlone.

[2] The barracks remains the home of 6th Infantry Battalion as the lead unit, and 2nd Brigade Artillery Regiment and detachments of 2 Engineer Company and the Medical Corps.

[5] In 1968 a larger nuclear bunker, housing the Integrated National Control Centre (INCC), was planned for Athlone.

This was planned to have capacity to accommodate and feed up to 300 people for a month and allow the Government to continue in the event of a nuclear emergency.

The Department of Defence and the Office of Public Works (OPW) drew up secret plans for a larger 20,000 sq ft (1,900 m2) underground bunker to include operations rooms, message centre, broadcasting studio, kitchens, offices, committee rooms, sleeping accommodation and 100,000 imperial gallons (450,000 L; 120,000 US gal) of uncontaminated drinking water.