29 December 1843, and was mentioned in despatches.
For his services in the Gwalior campaign Olpherts received the bronze decoration. Being specially selected by the governor-general, Lord EUenborough, to raise and command a battery of horse artillery for the Bundelcund legion, he was at once detached with the newly raised battery to join Sir Charles Napier's army in Sind. His march across India, a distance of 1260 miles, elicited Napier's highest praise. In 1846 Olpherts took part in the operations at Kot Kangra during the first Sikh war, when his conduct attracted the attention of (Sir) Henry Lawrence [q. v.], and he was appointed to raise a battery of artillery from among the disbanded men of the Sikh army. He was then hurried off to the Deccan in command of a battery of artillery in the service of the Nizam of Hyderabad, but was soon recalled to a similar post in the Gwalior contingent. In 1851 Olpherts applied to be posted to a battery at Peshawur, where he was under the command of Sir Colin Campbell [q. v.] and took part in the expedition against the frontier tribes. For this service he afterwards received the Indian general service medal sanctioned in 1869 for frontier wars. In the following year (1852) Olpherts took furlough to England, and was appointed an orderly officer at the Military College of Addiscombe.
On the outbreak of the Russian war in 1854 Olpherts volunteered for service, and was selected to join (Sir) William Fenwick Williams [q. v.] at Kars. On his way thither he visited the Crimea. Crossing the Black Sea, he rode over the Zigana mountains in the deep snow; but soon after reaching Kars he was detached to command a Turkish force of 7000 men to guard against a possible advance of the Russians from Erivan by the Araxes river. Olpherts thus escaped being involved in the surrender of Kars. Recalled to the Crimea, he was nominated to the command of a brigade of bashi bazouks in the Turkish contingent. On the conclusion of peace in 1856 he returned to India, and received the command of a horse battery at Benares,
Olpherts served throughout the suppression of the Indian Mutiny (1857-9). He was with Brigadier James Neill [q. v.] when he defeated the mutineers at Benares on 4 June 1857, and accompanied Havelock during the relief of Luclmow. His conduct in the course of that operation was highly distmguished. On 25 Sept. 1857, after the troops entered the city of Lucknow, Olpherts charged on horseback with the 90th regiment when ttnder Colonel Campbell two guns were captured in the face of a heavy fire of grape. Olpherts succeeded under a severe fire of musketry in bringing up the limbers and horses to carry off the captured ordnance (extract from Field Force Orders by General Havelock, 17 Oct. 1857). Olpherts almost surpassed this piece of bravery by another two days later. When the main body of Havelock's force penetrated to the Residency, the rearguard consisting of the 90th with some guns and ammunition was entirely cut off. However, Olpherts, with Colonel Robert (afterwards Lord) Napier [q. v.], sallied out with a small party, and by his cool determination brought in the wounded of the rearguard as well as the guns. Sir James Outram [q. v.], then in command of the Residency at Lucknow, wrote : 'My dear heroic Olpherts, bravery is a poor and insufficient epithet to apply to a valour such as yours.' Colonel Napier wrote in his despatch to the same effect. From the entry into Lucknow of Havelock's force until the relief by Sir Colin Campbell on 21 Nov. Olpherts acted as brigadier of artillery, and after the evacuation of the Residency by Sir Colin Campbell he shared in the defence of the advanced position at the Alumbagh under Sir James Outram. He took part in the siege and capture of the city by Sir Colin Campbell in March 1858, being again mentioned in despatches for conspicuous bravery. At the close of the campaign Olpherts received the brevets of major and lieutenant-colonel, as well as the Victoria cross, the Indian Mutiny medal with two clasps, and the companionship of the Bath.
In 1859-60 Olpherts served as a volunteer under Brigadier (Sir) Neville Chamberlain [q. v. Suppl. II] in an expedition against the Waziris on the north-west frontier of the Punjab, thus completing twenty years of continuous active service. Olpherts's dash and daring earned for him the sobriquet of 'Hell-fire Jack,' but he modestly gave all the credit for any action of his to the men under him. From 1861 to 1868 he commanded the artillery in the frontier stations of Peshawur or Rawal Pindi, and in that year he returned home on furlough, when he was presented with a sword of honour by the city and comity of Armagh. Returning to India in 1872, he commanded successively the Gwalior, Ambala, and Lucknow brigades, but quitted the country in 1875
