31 Service Battalion, formerly 23 (Hamilton) Service Battalion, is a Combat Service Support unit of The Canadian Army Reserve. It is currently commanded by Lieutenant Colonel Poole. The current Honorary Lieutenant Colonel is Kevin D Reed. The Hamilton Service Battalion was formed on 1 January 1965. The new battalion was made up of many units including 133 Company, Royal Canadian Service Corps, 16 Medical Company and 4 Ordnance Company. The unit became part of the Hamilton Militia District. On 3 November 2001, 23 Service Battalion was granted Freedom of the City of Hamilton by Mayor Bob Wade.