Mogami counterattack, losing Chikamori in battle and delaying the second division's approach towards Yamagata. The third division, comprising 3,000 men under Shida Yoshihide and Shimo Yoshitada, also advanced towards Yonegawa from the north via Shōnai. Kanetsugu arrived at Hasedō Castle on 21 October, the day of the Battle of Sekigahara, commencing the Siege of Hasedō. During the course of the siege, Date Masamune and Rusu Masakage crossed the mountain passes to encamp 2.5 km east of Yamagata on 24 October, and Rusu Masakage led an attempt to relieve the siege, prompting Kanetsugu to attempt to storm Hasedō; the assault was repelled, and Kanetsugu retreated leaving a holding force to threaten Hasedō. On November 5, news finally reached Kanetsugu of the defeat at Sekigahara and orders were given to lift the siege entirely, withdrawing the skeleton force to Yonezawa. Date Masamune capitalised on this withdrawal by attempting to besiege Fukushima Castle on 12 November, but withdrew when Uesugi Kagekatsu led a force to relieve the defenders. The Uesugi conflict with the Date and Mogami would outlast the Sekigahara Campaign proper, with a subsequent abortive attempt by Date Masamune to take Fukushima Castle defeated in battle at Matsukawa on 28 May 1601. Kyūshū theatre In the run-up to hostilities, Nabeshima Naoshige of Saga Domain intended to support the Tokugawa; however, his son Katsushige was present at Mitsunari's war council on 17 August and swayed him towards joining the Western Army. However, while the Nabeshima forces participated in some operations on Honshu including the assaults on Fushimi and Annotsu, Naoshige eventually recalled Katsushige to Kyūshū prior to the decisive battle at Sekigahara and switched allegiance to the Eastern Army. Tachibana clan head Tachibana Muneshige also joined the Western Army forces under the Mōri clan, leaving the defense of their hegemon Ōtomo clan's territory to his wife and co-clan head Ginchiyo. However, following the defeat at Sekigahara which Muneshige could not attend due to the protracted siege of Ōtsu, Muneshige also returned to defend his Kyūshū holdings. Katō Kiyomasa quickly began a campaign in Kyūshū to besiege the holdings of Konishi Yukinaga, a Mōri vassal and rival of Kiyomasa's who had fought under the Western Army at Sekigahara and fled into hiding following the battle. Kuroda Yoshitaka also separately marched on Ōtomo Yoshitsugu's territory, taking Ishitatewara Castle easily on 19 October. Kiyomasa besieged Udo Castle before meeting up with Kuroda Yoshitaka, who had already