They were known as cat and mouse stations. Target-finding aircraft controlled by Walmer were used extensively during the Battle of the Ruhr in March 1943. Oboe was one of the most precise navigational systems employed by any Air Force in the Second World War. Large numbers of personnel were based at Walmer during this period including many from the WAAF (Women's Auxiliary Air Force). In October 1943 a detachment from 2752 Squadron RAF Regiment (anti-aircraft) was deployed to Walmer followed by the full squadron in June 1944. Servicemen from both 2852 and 2844 Squadrons RAF Regiments were recorded as serving at Walmer. From December 1943 until October 1944 Walmer was the site for the second station for an RAF jammer system (Grocer) which was used against German Air Force airborne interception radar (Lichtenstein). The transmitters and monitor were placed strategically at Walmer and further south at Kingsdown so as to not interfere with the work of Oboe. Twin Browning machine guns were used for the defence of the site throughout this period. From June 1942 until 31 December 1944 Walmer was also used by M Balloon unit of the RAF for propaganda flights with the HQ at a house in St Clare Road (now Generals Meadow) which was used during the First World War as a military hospital. During February 1944 over 5,000,000 leaflets were dropped over Germany and France by 2,478 balloons released from Walmer. In 1945 RAF Walmer/Hawkshill Down was closed and it returned to agricultural use. On 12 August 2017 a new commemorative stand was placed on the Freedown on a site looking out over the English Channel. The stand was unveiled by the current Lord Warden of the Cinque Ports Admiral of the Fleet The Lord Boyce KG GCB OBE DL at a service led by the Vicar of Walmer and supported by the Chaplain of the Fleet and the Deputy Chaplain in Chief of the RAF. The new stand lists sixteen officers stationed at Walmer during the First World War and who lost their lives on active service. It also gives the history of the site during two World Wars. A wooden memorial had been placed on the site of the airfield in 1920 under the direction of the Countess of Beauchamp, wife of the then Lord Warden of the Cinque Ports. The location of the memorial has been changed a number of times, with the last site being on private land. There is very little of the original remaining.