He was commissioned into the 60th Rifles and was posted to Malta and British India before seeing active service in the European theatre of the First World War, which left him severely wounded.
In the early 20th century the usual tail male arrangement of the entailed largest landholdings became deprecated by powerful estates as it tended to leave noble daughters with little.
The 6th Duke, before dying in 1943 broke the entails and set up a trust which saw as his son the future 7th Duke left no son Welbeck Abbey and other large holdings would go to his granddaughters in turn including Lady Anne Cavendish-Bentinck.
[2] No viable family court case could ensue as the fee tail was abolished as a recognised entity in the abstract (in law) under the Law of Property Act 1925 and any remote, entailed beneficiaries could be disinherited under the Settled Land Acts.
In 1950, he married Gwyneth Ethel (d 1986), daughter of John Lesley Edwards and widow of Colonel David A.J.