[6] He briefly acted as deputy assistant quartermaster-general at Indian army headquarters from June–August 1900,[7] he then was appointed a staff officer in the China Field Force for the Boxer Rebellion later that year.

[9] He was appointed Commandant of the Cavalry School at Sangor in India from 1 July to 30 September 1912 and became Brigadier-General on the General Staff of the Northern Army on 1 October 1912.

[10] He relinquished command of the division on 8 December 1916,[4] to William Heneker and was appointed Adjutant General, India from 5 February 1917 until 30 October 1920, by which time the war was over.

[8] Following the Amritsar massacre in 1919 it fell to Hudson, in his capacity as Adjutant-General, to tell Brigadier General Reginald Dyer that he was relieved of his command.

[12] He was appointed General Officer Commanding-in-Chief, the Eastern Army in India on 1 November 1920,[4][13] before retiring in 1924.