He was commissioned as a lieutenant in the 4th (Militia) battalion of the Lincolnshire Regiment on 7 July 1897, and served as Aide-de-camp to the Earl of Ranfurly, Governor of New Zealand.
He was a member of the Anglo-German Fellowship from 1935 and served as President of the Liberty Restoration League, which was described by Inspector Pavey (an ex-Scotland Yard detective employed by the Board of Deputies of British Jews to infiltrate the far right) as being antisemitic.
When Archibald Maule Ramsay formed the 'Right Club' in 1939, Wellington chaired its early meetings.
Ramsay, describing the Right Club, boasted that "The main objective was to oppose and expose the activities of organised Jewry.
"[5] On the day that World War II broke out, the Duke of Wellington was quoted as blaming the conflict on "anti-appeasers and the fucking Jews".