Scouts were dispatched in every direction, and they gradually learned of the Mongol Empire's eastern campaign against the Eastern Islands.
It turned out that the Mongols had launched two landings. During the first, they encountered fierce resistance from the Eastern Islands. The islands had only recently emerged from a century of civil war, and Toyotomi Hideyoshi had unified the nation. Whether in the quality of their commanders or the fighting strength of their soldiers, they were exceptionally elite.
At first, they had waited at ease for the exhausted enemy and established an extremely solid defense on their homeland. The Mongol and Goryeo allied forces suffered devastating losses in their first landing assault. Even Imperial Tutor Phags-pa died amid the chaos of battle.
However, the Mongols had come out in full force this time, and with the Goryeo navy's assistance, they regrouped and launched a second landing. After paying a dreadful price, they finally succeeded in coming ashore.
Once they reached land, the Mongol cavalry's advantage came into play. The Eastern Island forces, which had previously fought them to a standstill, finally could not hold on and began to retreat. Toyotomi Hideyoshi's main army was battered again and again by Mongol cavalry charges until it finally collapsed in total rout.
Over the following days, they pursued the fleeing enemy and fought a series of further battles. Toyotomi Hideyoshi's main force was nearly annihilated, and he himself died on the battlefield.
The Eastern Islands had just endured a century of war. Even after Toyotomi Hideyoshi unified the country, its internal situation had remained highly unstable. Now that he was dead and his main army had been wiped out, the ambitious figures elsewhere could no longer restrain themselves. They rebelled against the Toyotomi clan one after another, with Tokugawa Ieyasu being the strongest