Goryeo-Yuan Invasions of Japan
The Yuan, using Goryeo as its spearhead, twice invaded Japan, and both times its fleets were wrecked by storms. Supplying ships, troops and grain placed a heavy burden on Goryeo.

Unknown (commissioned by Takezaki Suenaga) · Public domain · Source
In 1274 some 30,000 Yuan and Goryeo troops, the Goryeo contingent under Kim Bang-gyeong, sailed in about 900 Goryeo-built ships via Tsushima and Iki to Hakata Bay but withdrew in a storm. In 1281 an Eastern Route Army from Goryeo and a Southern Army from Jiangnan, some 140,000 men in all, were again wrecked by a typhoon — the "divine wind" (kamikaze) of Japanese tradition.