The Artists Rifles and served in France from October 1916 as a Lieutenant with the 5th Border Regiment. In January 1917 he developed a duodenal ulcer and returned to England. In April 1918 he married Cordelia Clara Tregurtha, whom he had first met in Newlyn. Dobson was formally invalided out of the Army in November 1918 and by then had already submitted several drawings to the British War Memorials Committee and was commissioned to paint a barrage balloon site on the Thames estuary. The Air Force representatives on the Committee did not approve of the picture and Dobson did not receive any further official commissions. Dobson set up a studio in the Tregurtha family home in Newlyn but towards the end of the war he took a studio in Manresa Road in Chelsea and would live there until the start of the Second World War. Inter-war years Throughout the 1920s Dobson focused increasingly on sculpture, exhibited work in several influential exhibitions and played a leading role in a number of artistic groups. He was the only sculptor to take part in the 1920 Group X exhibition. Dobson was a founding member of the London Artists Association and spent three years as President of the London Group between 1923 and 1927. He made bronze portraits of several public figures. At the Group X exhibition he exhibited two sculptures and studies of Ben Nicholson and his bronze head of H. H. Asquith was shown at the Leicester Galleries in late 1921. Other subjects included Osbert Sitwell, Lydia Lopokova and Tallulah Bankhead. Dobson exhibited at the Venice Biennale in both 1924 and in 1926, was featured in the 1925 Tri-National Exhibition which visited London, Paris and New York and was also included in the 1926 European artists exhibition that toured America and Canada. In March 1927 he had his first major one-man exhibition when the Leicester Galleries exhibited twenty-three of his sculptures and several bronzes. In 1930 the Tate purchased a larger-than-life sculpture from Dobson and erected it outside the gallery on Millbank. During the early 1930s Dobson continued to receive portrait commissions, most notably for Sir Edward Marsh and the actress Margaret Rawlings. Dobson worked in other media including textiles and silver, as well. His silver gilt cup, Calix Majestatis, to mark the coronation of George VI and Queen Elizabeth is now in the Royal Collection. During 1933 Dobson fractured his left