Seeking to ensure the security of Nobunaga's possessions, Shibata Katsuie and Sasa Narimasa, two of his chief generals, rode north from Toyama Castle, and laid siege to both the town of Uozu and nearby Matsukura Castle with 16,000 men. Uozu Castle fell on June 3, 1582; Oda Nobunaga would die three days later, in Kyoto, in the Incident at Honnō-ji.