Montagu briefly served in the
Mediterranean Fleet as a
midshipman aboard the
dispatch boat under the command of
A. C. Hobart. He was personally selected to serve aboard the
frigate by
Henry Keppel, with the ship departing from Portsmouth for
China Station in October 1856; ''Raleigh's
28-day voyage to the Cape of Good Hope was considered to be a record for a sailing ship. After brief stops at Penang and Singapore, Raleigh
proceeded with haste to Hong Kong with war imminent with China. After several months at sea, Raleigh
came to within thirty miles of Hong Kong, when on 14 April 1857 the ship struck uncharted rocks. Despite the efforts of the ships crew to pump the water out of the ship for long enough to reach Hong Kong, the Raleigh'' ended up beaching on mud banks, with the ships crew evacuating to a nearby island. With assistance from the
French Navy, the crew returned to Hong Kong, with Montagu returning aboard . Montagu was assigned to , again under the command of Keppel.
Hong Kong sailed for the
Canton River in May and was present for the
victory at Fatshan Creek in June. Following the action at Fatshun, war operations for the
Hong Kong were more or less over, with the ship conducting anti-pirate patrols in the waters around Hong Kong. In July 1857, he was transferred to under the captaincy of
Edward Sotheby. After shore leave in Hong Kong, Montagu was ordered to return to the
Pearl where it was to sail for
Calcutta to help in the effort to suppress the
Indian Mutiny. Upon arrival in Calcutta, the
''Pearl's'' Naval Brigade, consisting initially of 100
Royal Marines and sailors was formed. Montagu was not initially part of the first detachment and spent six weeks in Calcutta, where he socialised with
Lord and Lady Canning. Montagu was added to the Naval Brigade in October, which took its numbers up to 175. The additions to the brigade were ordered to reinforce Sotheby and sailed aboard a steamer up the
Ganges past
Benares, before disembarking at
Patna in November. There Montagu purchased a pony. The brigade was stationed on the borders of the
Gorakhpur district and in November 1857 they faced mostly disorganised rebels. The brigade initially fortified their position on the basis of superior rebel numbers, with Montagu noting general mistreatment of natives by British forces. By late December he had been appointed
aide-de-camp to General Rowcroft, the commander of forces for which the Naval Brigade formed. On 26 December Montagu saw action against some 4,000 to 5,000
Sepoy mutineers, with the smaller British force of 1,400 men and four
guns routing the native forces. From later December to February 1858, Montagu was charged with sending out detachments to burn rebel villages and the houses of
Rajas. Later Montagu assisted the brigade in constructing a bridge over the
Gogra to allow
Jung Bahadur Rana army of
Gurkhas to cross into
Oude to assist
Lord Clyde. Shortly after he saw action at the
Battle of Phoolpore, which resulted in a British victory, which secured passage to
Lucknow. The brigade were not part of the force which marched for Lucknow, instead being sent back to defend the Gorakhpur district. There they engaged rebel forces in a number of skirmishes, before being sent to a cantonment at Bustee following the
Capture of Lucknow in March 1858. There they remained for seven months until November, playing
cricket to keep himself amused. The brigade final action came in December 1858, at
Toolsepore on the edge of the
Terai jungle, where the rebels were rumoured to be making a grand last stand. The rebels were engaged and fled, with Montagu pursuing them for three days toward
Intwa, joining up with the forces of
Sir Hope Grant. On 3 January 1859, the Naval Brigade was ordered to return to the
Pearl via
Allahabad, returning to Calcutta on 2 February. On the return voyage home, Montagu learnt of the death his mother. Montagu's contribution to helping suppress the mutiny was praised by both
Houses of Parliament and being decorated with the
Indian Mutiny Medal. ==Later career and life==