Franklin's lost expedition was a British voyage of Arctic exploration led by Captain Sir John Franklin that departed England in 1845 aboard two ships, HMS Erebus and HMS Terror. A Royal Navy officer and experienced explorer, Franklin had served on three previous Arctic expeditions, the latter two as commanding officer. His fourth and last, undertaken when he was 59, was meant to traverse the last unnavigated section of the Northwest Passage. After a few early fatalities, the two ships became icebound in Victoria Strait near King William Island in the Canadian Arctic. The entire expedition, 129 men including Franklin, was lost.
Pressed by Franklin's wife, Jane, Lady Franklin, and others, the Admiralty launched a search for the missing expedition in 1848. Prompted in part by Franklin's fame and the Admiralty's offer of a finder's reward, many subsequent expeditions joined the hunt, which at one point in 1850 involved eleven British and two American ships. Several of these ships converged off the east coast of Beechey Island, where the first relics of the expedition were found, including the graves of three crewmen. In 1854, explorer John Rae, while surveying near the Canadian Arctic coast southeast of King William Island, acquired relics of and stories about the Franklin party from the Inuit. A search led by in 1859 discovered a note left on King William Island with details about the expedition's fate. Searches continued through much of the 19th century. In 2014, a Canadian search team located HMS Erebus west of O'Reilly Island, in the eastern portion of Queen Maud Gulf, in the waters of the Arctic archipelago. Finally, two years later, the HMS Terror wreck was found south of King William Island in pristine condition by the Arctic Research Foundation.