Lieutenant-General Henry James Buchanan CB (1830 – 7 October 1903) was a British Army officer who became General Officer Commanding Eastern District.

Buchanan was commissioned as an ensign in the 47th Regiment of Foot on 14 June 1850.

[1] He fought at the Battle of Alma in September 1854 and the Battle of Inkerman in November 1854 as well as the Siege of Sevastopol during the Crimean War.

[2] He went on to be Commander of the 3rd Brigade at Aldershot in January 1887 and General Officer Commanding Eastern District in January 1889.

[3] He was also Colonel of the Norfolk Regiment from 1898 to his death.