King Chungnyeol of Goryeo vs Lothair I

King Chungnyeol provided Goryeo ships, troops, and supplies for the first Mongol invasion of Japan. Goryeo forces suffered heavy losses in the failed campaign, which ended with the destruction of the fleet by a typhoon. This strained Goryeo's resources and population.

King Chungnyeol married Princess Jeguk, a daughter of Kublai Khan, becoming the first Goryeo king to take a Mongol wife. This marriage formalized the Mongol-Goryeo alliance and made Chungnyeol a Mongol son-in-law (kuregen), strengthening ties with the Yuan dynasty.

King Chungnyeol ordered Goryeo officials to adopt Mongol hairstyles and clothing, and introduced Mongol court ceremonies. This policy aimed to appease the Yuan court but caused resentment among Korean nobles who saw it as a betrayal of Korean identity.

King Chungnyeol again mobilized Goryeo's navy and army for the second Mongol invasion of Japan. The campaign ended in disaster when a typhoon (kamikaze) destroyed the combined Mongol-Goryeo fleet, resulting in massive casualties and further draining Goryeo's economy.

Lothair I was crowned co-emperor by Pope Paschal I in Rome, receiving the imperial title from his father Louis the Pious. This coronation affirmed Lothair's status as the senior heir and future ruler of the Carolingian Empire, though it later led to conflict with his brothers.

Lothair I led a rebellion of nobles against his father, Emperor Louis the Pious, resulting in Louis's temporary deposition. Lothair seized power but was later forced to restore his father after the intervention of his brothers. This event deepened family divisions.

Lothair I's forces were defeated by the combined armies of his brothers Louis the German and Charles the Bald at Fontenoy-en-Puisaye. The battle was a bloody civil war that weakened the Carolingian dynasty and led directly to the negotiations for the Treaty of Verdun.

Lothair I, along with his brothers Louis the German and Charles the Bald, signed the Treaty of Verdun, dividing the Carolingian Empire into three kingdoms. Lothair received Middle Francia, including the imperial title and the cities of Aachen and Rome.

Lothair I abdicated the throne and divided Middle Francia among his three sons: Louis II (Italy and imperial title), Lothair II (Lotharingia), and Charles (Provence). He then retired to Pr