In March 1888, Baldwin was seconded for service with the Indian Staff Corps, joining the
4th Punjab Infantry Regiment and serving with them in the
Hazara Expedition of 1888. Two years later in 1890 he joined the
Queen's Own Corps of Guides as a
lieutenant and
squadron commander. He was again wounded in November 1897, this time severely during operations in the
Malakand District and
Swat valley. and
major in February 1904. He held the appointment of a
Deputy Assistant Adjutant General on the staff in India from 1 April 1905 to 31 March 1908. He was promoted Lieutenant Colonel on 30 January 1912, and on 13 July 1913 transferred from the
Queen's Own Corps of Guides to the
25th Cavalry (Frontier Force) and was appointed second in command. He was appointed commandant of the
25th Cavalry (Frontier Force) on 5 April 1914. In August 1914 the
25th Cavalry (Frontier Force) was stationed in Bannu, as part of the Bannu Brigade. On the 29th October 1914 the Bannu Moveable Column was mobilised and marched up the Tochi. A lashkar of Zadrans had been reported as advancing to attack Miranshah post. In March 1915 he took part in the action at Miranshah in the
Tochi Valley, and was again mentioned in dispatches and was promoted to
brevet colonel in October 1915. as 'a reward for distinguished service in the Field'. In February 1916, he was promoted to temporary
brigadier-general and commander of the
Derajat Brigade. For his brigades conduct during the operations undertaken against the
Mahsuds during the period March to August, 1917 he was once more mentioned in dispatches. The Headquarters
10th Indian Cavalry Brigade was formed under 1st (Peshawar) Division in May 1917, and on the 10th May he was appointed commander holding the rank of temporary
brigadier-general. He was promoted substantive Colonel in the London Gazette 19 February 1920 with seniority from 1 Jan 1917. He retired from the army 12 August 1920, being granted the honorary rank of brigadier-general. . ==Family life==