Walmer Castle against Charles' brother, King James II, the townsfolk of Deal seized Walmer Castle on behalf of William III, the Prince of Orange. By the end of the century, however, the castle was increasingly regarded as out of date from a military perspective. In the 18th century, Walmer Castle became the official residence of the Lord Warden of the Cinque Ports. The Lord Warden was originally a medieval title linked to five key ports along the coast of England; the position's prominence had faded, but it still retained important judicial and military functions. When Lionel Sackville, the Duke of Dorset, was
1st Cinque Ports Artillery Volunteers the howitzer battery (234) at Folkestone was detached to become 223 (Cinque Ports) Independent AA Battery; the numbering of the other batteries was changed, so that 236 Bty at Deal took the number 234. Then on 1 November 1938 the rest of the brigade was converted, becoming 75th (Home Counties) (Cinque Ports) Anti-Aircraft Brigade under the command of Lt-Col Stebbings, and 223 Bty rejoined. RA 'brigades' were redesignated 'regiments' shortly afterwards. With the expansion of the TA after the Munich Crisis, most units split to form duplicates. In the case of 75th, the CO, Lt-Col Stebbings, left with 234th and