Deputy Surgeon-General John Madden entered the army as an Assistant Surgeon in October 1846. He served in the Kaffir war in 1851–1853 with the 43rd Regiment Light Infantry, and had the medal for that campaign. Plate V (page 290) in Medals and Campaigns of the 43rd Foot by Major William J. Freer DL VD FSA shows the South Africa Medal 1853 awarded to Assistant Surgeon John Madden.
2 Oct 1846 Assistant Surgeon 1st West India Regiment.
3 Apr 1849 Assistant Surgeon 43rd (Monmouthshire Light Infantry) Regiment.
1851–1853 Served with the 43rd Regiment in the Kaffir War, Eastern Cape South Africa.
2 Oct 1857 Promoted Surgeon 2nd/8th (The King's) Regiment.
Malta 5 Oct 1863 Arrived from Gibraltar.
Malta 1864 Surgeon 2nd/8th Foot.
Malta 28 June 1865 To England on leave.
Malta 30 Oct 1865 Returned to Malta.
Malta 2 Oct 1866 Promoted Surgeon–Major 2nd/8th Foot.
Malta 1867 On duty with 2nd/8th Foot until he retired in 1875.
Malta 29 Feb 1868 Departed for England with his regiment.
9 Dec 1875 Retired to half-pay with the honorary rank of Deputy Surgeon–General.
1879–1880 Resident at 9 Rutland Square East Dublin.
8 Mar 1886 Died in Dublin.
- Drew R., 1968. Entry No: 4896. Medical Officers in the British Army 1660 – 1960. Volume 1: 1660 – 1898. London: Wellcome Historical Medical Library.
- RAMC/PE/3/27/Drew. Manuscript for Drew's Roll.
- Succession Book Vol 5 (1 May 1846). Returns of service of medical officers in the Regular Army.
- Naval and Military Medical Services. Br Med J (1886), 1001; (Published 22 May 1886).