The Battle of Rome in 2173 is a pivotal event for humanity that took place in the Alternate Timeline. The center of the event was Ky Kiske, who was a young, high ranking official commanding a fleet of airships. He responded to a distress signal sent from the city of Rome. He hesitated at first as the situation seemed hopeless because of the large number of Gears, but because of the belief that there are still people who need to be saved, he pressed onto the mission.