姉川の戦い
The Battle of Anegawa occurred near Lake Biwa in Ōmi Province, Japan. The allied forces of Oda Nobunaga and Tokugawa Ieyasu defeated the combined forces of the Azai clans and Asakura clans, and saw Nobunaga's prodigious use of firearms. It is notable as the first battle that involved the alliance between Nobunaga and Ieyasu.