The Mongol-Korean fleet refers to the naval forces assembled by the Mongol Empire in the 13th century, particularly during their invasions of Japan in 1274 and 1281. This fleet was primarily composed of Korean ships and sailors, reflecting the collaboration between the Mongols and the Goryeo Dynasty. The fleet played a crucial role in the Mongol attempts to conquer Japan, but it ultimately faced significant challenges, including fierce resistance from the Japanese and natural disasters.