HMS Calliope was a Calypso-class corvette (later classified as a third-class cruiser) of the Royal Navy of the United Kingdom which served from 1887 until 1951. Exemplifying the transitional nature of the late Victorian navy, Calliope was a sailing corvette—the last such ship built for the Royal Navy—but supplemented the full sail rig with a powerful engine. Steel was used for the hull, and like the earlier iron-hulled corvettes, Calliope was cased with timber and coppered below the waterline, in the same manner as wooden ships.

Calliope was known for "one of the most famous episodes of seamanship in the 19th century", when the vessel was the only ship present to avoid being sunk or stranded in the tropical cyclone that struck Apia, Samoa in 1889. After retirement from active service, Calliope served as a training ship until 1951, when she was sold for breaking.

Calliope and sister ship Calypso comprised the Calypso class of corvettes designed by Nathaniel Barnaby. Part of a long line of cruiser classes built for protecting trade routes and colonial police work, they were the last two sailing corvettes built for the Royal Navy. Corvettes had been built of iron since the Volage class of 1867, but the Calypsos and the preceding Comus class used steel. Corvettes were designed to operate across the vast distances of Britain's maritime empire and could not rely on dry docks for maintenance. Since iron and steel hulls were subject to biofouling and could not easily be cleaned, the established practice of copper sheathing was extended to protect them; the metal plating of the hull was timber-cased and coppered below the waterline. The only armour was a 1.5-inch (38-mm) armoured deck covering the machinery spaces, but coal bunkers along the sides gave some protection to the machinery spaces.

Calypso and Calliope differed from their nine predecessors of the Comus class in armament; they were also slightly longer, had a deeper draught, and displaced 390 tons more. Originally planned as a ten-gun corvette, Calliope was completed with four 6-inch (152.4 mm) breechloaders in sponsons fore and aft on each side, twelve 5-inch (127.0 mm) breechloaders in broadside between the 6-inch guns, and six quick-firing Nordenfelt guns.

The compound-expansion steam engine was supplied with steam by six boilers and developed 4,023 indicated horsepower (3,000 kW). This was 50% more powerful than the predecessor class, which gave the corvette one more knot of speed, a difference that would be crucial in the disaster that made Calliope famous. The engine drove a single feathering screw, and enabled the vessel to reach a speed of 13¾ knots, or 14¾ knots with forced draught. The vessel nevertheless was a fully rigged sailing ship, allowing sustained service in areas where coaling stations were far apart. Calliope was well-suited to distant cruising service for the British Empire at its Victorian peak.

Although laid down in 1881, Calliope was not launched until 1884, and was placed in reserve at Portsmouth before completion. She was activated on 25 January 1887, when the vessel was placed in commission for the China Station, the sort of distant service for which the class had been designed. The same year, all corvettes and frigates were re-classified as "cruisers", with Calliope and Calypso falling into the "third-class cruiser" category.

The British Empire was the largest on Earth, and Britain protected that empire and its trade routes with the world's largest navy. Great Britain assumed the role of peacekeeper on the world's oceans, and the Royal Navy was the instrument by which the Pax Britannica was kept. The global reach of the Royal Navy included the western Pacific Ocean, patrolled by the Australia Station. In 1887 Captain Henry Coey Kane took Calliope to the Pacific. At first assigned to the China Station, the vessel was reassigned to the Australia Station later in 1887. It was in New Zealand at the end of that year, and was the first vessel to enter the new Calliope Dock. In early 1888 Calliope was sent north to watch over a looming diplomatic crisis and potential military confrontation in Samoa.

This crisis had its roots in the Great Powers' competition for colonies in the last decades of the 19th century. The German Empire, invigorated by its victory over France in the Franco-Prussian War and by its unification under the Prussian monarchy, had newfound imperial ambitions that stretched beyond Europe. It had shared in the division of Africa, and in the 1880s looked to the Pacific as well. Ships of its Imperial Navy were sent to Apia in Samoa, where German agents had fomented rebellion against the indigenous government. They were countered there by the Asiatic Squadron of the United States Navy. The United States had nearly completed establishing control over its territories on the North American continent, leading American ambitions to stretch beyond its shores. The squadron was at Samoa to assert US interests in the Pacific and to watch the Germans.