Constantine IV vs Emperor Jimmu

Constantine IV successfully defended Constantinople against a massive Arab siege that lasted from 674 to 678. The Byzantine victory, aided by the use of Greek fire, forced the Umayyad Caliphate to sue for peace and pay tribute.

Constantine IV continued the reorganization of the Byzantine military into thematic provinces. This system, which combined civil and military authority, proved effective in defending the empire against external threats.

Constantine IV convened the Third Council of Constantinople, which condemned Monothelitism as a heresy. The council restored religious unity between Constantinople and Rome, ending a long-standing theological dispute.

Jimmu led the Eastern Expedition from Hyuga (southern Kyushu) eastward, conquering territories through battles such as the Battle of Usa and the Battle of Takachiho. This campaign is described in the Nihon Shoki and Kojiki as the founding military conquest of Japan.

According to Japanese mythology, Emperor Jimmu became the first emperor of Japan in 660 BC after leading a military campaign from Kyushu to Yamato. He is said to have established the imperial dynasty at Kashihara, unifying the warring clans under his rule.

After his conquest, Jimmu was enthroned as emperor at the Kashihara Palace in Yamato (present-day Nara Prefecture) on the first day of the first month of 660 BC. This event is considered the traditional founding date of the Japanese imperial line.

According to legend, Jimmu received the Three Sacred Treasures (the sword Kusanagi, the mirror Yata no Kagami, and the jewel Yasakani no Magatama) from the gods, which became the imperial regalia symbolizing the emperor's divine right to rule Japan.

Emperor Jimmu died in 585 BC at the age of 126 according to traditional accounts. He was later deified as a kami (spirit) in Shinto, and his tomb is traditionally located in the Unebiyama area of Nara Prefecture. His legacy as the founder of Japan's imperial line continues to be celebrated.