Guyuk Khan vs Philip III of France

Güyük was elected as the third Great Khan of the Mongol Empire at a kurultai near the Mongol capital Karakorum. His election was supported by his mother Töregene, who had served as regent, but was opposed by Batu, leading to tensions.

Güyük received the Franciscan envoy John of Plano Carpini at his court, who delivered a letter from Pope Innocent IV demanding the Mongols cease their invasions. Güyük's reply demanded the Pope's submission to Mongol authority, reflecting Mongol imperial ideology.

Güyük planned a military campaign against his cousin Batu, ruler of the Golden Horde, due to Batu's refusal to recognize his authority. The conflict was averted when Güyük died in 1248, but it deepened the rift between the Toluid and Jochid lines.

Güyük died suddenly in 1248 while marching west to confront Batu, possibly poisoned. His death left the empire without a clear successor, leading to a regency by his widow Oghul Qaimish and eventually the election of Möngke in 1251.

Philip III's father, Louis IX, signed the Treaty of Corbeil, which renounced French claims to Catalonia and Roussillon in exchange for Aragonese renunciation of claims to Provence and Languedoc. Philip III inherited this settlement.

Philip III invaded Navarre to enforce his claim as regent for his niece, Joan I of Navarre. He secured control of the kingdom, which later passed to his son Philip IV through marriage, expanding French influence in the Pyrenees.

Philip III led the Aragonese Crusade, a papal-sanctioned invasion of Aragon to depose King Peter III. The French army was defeated at the Battle of the Col de Panissars and forced to retreat, suffering heavy losses. Philip III died during the retreat.