[6] He became Assistant Adjutant-General of the Punjab Frontier Force on 30 November 1886[7] and, having been promoted to major on 8 June 1887,[8] he took part in the Hazara Expedition in 1888 and in operations in the Khyber Pass in 1891 for which he was awarded the Distinguished Service Order (DSO) on 30 May 1891.

[13] Egerton commanded a contingent of troops sent to Suakin in 1896 to hold the town when its permanent garrison was withdrawn for service under Lord Kitchener following which he became an aide-de-camp to the Queen on 17 November 1896.

[17] A promotion to the substantive rank of major-general followed on 1 April 1902[18] and, after leading an expedition to Waziristan later that year, he was advanced to Knight Commander of the Order of the Bath (KCB) in the 1903 Durbar Honours on 1 January 1903.

[22] Egerton took leave from Madras post to take command of the troops in British Somaliland fighting the Dervishes led by Mohammed Abdullah Hassan on 27 June 1903.

[29] In retirement Egerton wrote about his wartime experiences and was the author of a book entitled "Hill Warfare on the North-West frontier of India".