The Brusilov expedition (Russian: Экспедиция Брусилова) was a Russian maritime expedition to the Arctic led by Captain Georgy Brusilov, which set out in 1912 to explore and map a route from the Atlantic Ocean to the Pacific via a northeast passage known as the Northern Sea Route. The expedition was ill-planned and ill-executed by Brusilov, and disappeared without a trace. Earlier searches were unsuccessful, and the fate of the ship and its crew is still not known.