Campbell arrived back in London early in March 1716, and at first stood high in the king's favour, but in a few months was stripped of his offices. This, however, did not deter him from the discharge of his parliamentary duties; he supported the bill for the impeachment of
Bishop Atterbury, and lent his aid to his countrymen by opposing the bill for punishing the city of Edinburgh for the
Porteous Riots. At the beginning of the year 1719 he was again admitted into favour, and in April was created
Duke of Greenwich. under the
Walpole–Townshend Ministry. He also became colonel of the
Queen's Regiment of Horse in August 1726 and, having been appointed
Governor of Portsmouth in November 1730, he was restored to the colonelcy of the
Royal Horse Guards in August 1733. In the 1720s he commissioned the architect
James Gibbs to design a
Palladian house at
Sudbrook Park close to his birthplace at Ham House. Promoted to
field marshal on 31 January 1735, Campbell was stripped of his post as Master-General of the Ordnance and the colonelcy of the Royal Horse Guards for opposing the Government of
Robert Walpole in 1740. However he was restored to his post as
Master-General of the Ordnance in February 1741 and restored to his colonelcy a few days later. However, disapproving the measures of the new administration, and apparently disappointed at not being given the command of the army, he shortly resigned all his posts, and spent the rest of his life in privacy and retirement. Campbell died at
Sudbrook Park, Petersham on 4 October 1743 and was buried in
Westminster Abbey; his grave is marked by a small
lozenge stone to the north east of
Henry VII's tomb. A large monument, designed by the French sculptor,
Louis-François Roubiliac, was erected for him in the south transept and unveiled in 1749.
Argyll Street in London's
West End is named after him. ==Family==