Lieutenant-General James FitzGerald, 1st Duke of Leinster, PC (Ire), styled Lord Offaly until 1743 and known as The Earl of Kildare between 1743 and 1761 and as The Marquess of Kildare between 1761 and 1766, was an Anglo-Irish nobleman, soldier and politician.

The Board of Ordnance in the Kingdom of Ireland (1542–1800) performed the equivalent duties of the British Board of Ordnance: supplying arms and munitions, overseeing the Royal Irish Artillery and the Irish Engineers, and maintaining the fortifications in the island.