Franklin's lost expedition was a British voyage of Arctic exploration led by Captain Sir John Franklin that departed England in 1845. 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.