Autumn War
The Autumn War was the short-lived war between Gridania and Ala Mhigoin the year 1468 to 1469, and then the entire Eorzean Alliance. Following centuries of peace, King Manfred suddenly enacted their sovereign claim on the land of the East Shroud, and sent in military forces to claim it in a bid to expand their territory. General Gylbarde led his men across the Velodyna River and was met by Vainchelon Whitewater and his troops, who engaged in battle, which ended in a stalemate. Vainchelon retreated back to the Nine Ivies to lure Gylbarde and his men into a trap, but passed away in camp from a sudden illness before his plan could be enacted.
Fearing that Ala Mhigo would attempt to expand into Coerthas should his invasion into Gridania succeed, Ishgard petitioned Ul'dah and Limsa Lominsa to form a unionized front and stand with Gridania. This was the first instance of the Eorzean Alliance. Ala Mhigo stood no chance against the sheer numbers of the Alliance, and surrendered. Following this, peace treaties and pacts were drawn up and borders were laid down. Each nation was allowed to remain independent, even following Ala Mhigo's transgressions, however no one nation would be permitted to rise up against any other. With this, the Autumn War came to an end.