In the first year of Yongxing of the Great Song Dynasty, 1237 AD, the first day of the ninth month, the Tsushima Strait.

The Tsushima Strait is the gateway from Japan to the East China Sea, the Yellow Sea, and the Pacific Ocean, and is the "chokepoint" of the Sea of Japan. Tsushima Island and Iki Island are located between the Tsushima Strait, and Goryeo Hepu and Hakata of Japan are far away.

Sail from Koryeo's Hepo to the Tsushima Islands, then to Iki Island, and finally to the port of Hakata in Kyushu, Japan.

Iki Island is located between Kyushu and Tsushima Island, just 30 miles off the coast of Kyushu. The Song army occupied Tsushima Island and Iki Island, threatening the port of Hakata on the Japanese mainland. Wide......

Chapter 112 of "Crossing the Southern Song Dynasty and Being the Emperor" Kyushu is in the middle of the hand, please wait a moment,

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