During the Indian Mutiny, Major General George Stewart, CB served as a subaltern in the Volunteer Cavalry with Havelock's Force from its first taking to the field in July 1857. He was present at the actions of Futtehpore, Aoung, Pandoo Nuddee, Cawnpore, Oonao, Busserutgung (both actions), Bithoor, and Mungarwar. In the Lucknow Campaign he was present at the Alumbaugh, the Relief of Lucknow, subsequent Defense of the Residency, and at the Final Capture of Lucknow. He served afterwards in the 1^st Sikh Cavalry in the actions of Simree, Nawabgunge, Bara, Bankee, the reoccupation of Fyzabad, the actions of Poorwa, Morar, and Mhow (mentioned in despatches for gallantry), the taking of the fort of Simree, the actions of Murputgung and Doondiakiera, taking of the forts of Omerea and Futtehpore, and the action of Koolie-ka-bund - wounded and horse wounded (Medal and two Clasps, and a year's extra service).

Served with the 1^st Sikh Cavalry throughout the campaign of 1860 in China, including the actions of Sinho (wounded and mentioned in despatches, "for forward gallantry"), Chankiawhan, Palichau, and at the surrender of Peking (Medal with two Clasps).

Served with the 11^th Bengal Cavalry in the Umbeyla Campaign under General Garvock in 1863 (Medal and Clasp).

Served with the Corps of Guides in the Jowaki Expedition in 1877-78, under General Keyes (mentioned in despatches and Clasp). Present in the operations against the Ranizal village of Skhakat on the 14^th of March 1878, and commanded the cavalry in the attack on the Utman Kheyl villages on the 21^st of March 1878.

Commanded the Guides Cavalry in the Afghan War of 1878-80, and was present at the capture of Ali Musjid and the engagements around Cabul in December 1879, and at Charasia (mentioned in despatches, Brevet of Lt. Col., Medal with two Clasps).

General Stewart retired from the Army in 1887 with 31 years of service.