Andrea Doria vs Choe U

Doria switched allegiance from France to the Holy Roman Empire, using his fleet to expel the French from Genoa. He reestablished the Genoese Republic under a new constitution, becoming its de facto ruler.

Doria led a combined Spanish-Genoese fleet against the Ottoman admiral Hayreddin Barbarossa. He captured several fortresses in Greece, but failed to defeat Barbarossa decisively. The campaign was a mixed success.

Doria commanded the fleet for Emperor Charles V's expedition to capture Tunis from the Ottoman corsair Barbarossa. The city was taken and sacked, temporarily securing the central Mediterranean for Christian powers.

Choe U succeeded his father Choe Chung-heon as head of the military regime, maintaining control over Goryeo through puppet kings. He continued the family's authoritarian rule, suppressing any opposition.

Choe U refused Mongol demands for submission and tribute, leading to a series of Mongol invasions. His defiance prolonged the war but ultimately resulted in devastating campaigns against Goryeo.

Choe U moved the Goryeo court to Ganghwa Island to escape Mongol attacks, using the island's natural defenses. This allowed the regime to continue resistance but left the mainland vulnerable to Mongol raids.

Choe U died, and his son Choe Hang succeeded him. However, internal divisions weakened the regime, leading to its eventual collapse in 1258 and the restoration of royal authority under Mongol influence.