 Initially considering it implausible that a minefield was responsible for sunk shipping, Hall-Thompson organised the minesweeping operations of 1918 to clear them.For his services during the war, he was made a Companion of the Order of St Michael and St George and awarded the Order of the Rising Sun, 3rd Class, by Emperor Taishō of Japan.In 1919, much to his disappointment as he enjoyed living in New Zealand, Hall-Thompson was recalled to England.