Leo I the Thracian vs Mursili I

Leo I was crowned Eastern Roman Emperor by Patriarch Anatolius of Constantinople. This was the first time a Byzantine emperor was crowned by a patriarch, establishing a precedent for the role of the Church in imperial coronations and strengthening the bond between church and state.

Leo I, in cooperation with the Western Emperor Anthemius, launched a massive naval expedition against the Vandal Kingdom. The campaign ended in a catastrophic defeat at the Battle of Cape Bon, costing the empire immense resources and weakening its military position.

Leo I ordered the assassination of the powerful Alan magister militum Aspar and his son, who had dominated the Eastern court for decades. This act ended the Germanic influence over the Eastern Roman army and solidified Leo's authority, but also led to a brief civil war.

Mursili I conquered the city of Aleppo, a major center in northern Syria. This victory eliminated the Yamhad kingdom, a rival power, and extended Hittite influence into Syria.

Mursili I led a Hittite army on a long-distance raid that culminated in the capture and destruction of Babylon. The Hittites plundered the city and ended the First Babylonian Dynasty of Hammurabi, though they did not establish lasting control.

Mursili I was assassinated by his brother-in-law Hantili I, who seized the throne. The assassination plunged the Hittite Old Kingdom into a period of instability and dynastic conflict.