1570: Full-scale Formation of the First Anti-Nobunaga Coalition - Sengoku Shogun Map
The defection of Azai Nagamasa became evident with the retreat at Kanegasaki. Although the Oda–Tokugawa alliance won the subsequent Battle of Anegawa, the Ishiyama War began, expanding the front. The Siege of Shiga underscored the tense situation in the Kinai region, heightening pressures that would culminate in the burning of Mount Hiei the following year.
Major events
- 1570-04: Retreat at Kanegasaki — During the Echizen campaign, Azai Nagamasa suddenly defects. Oda Nobunaga faces encirclement by Asakura Yoshikage but retreats successfully thanks to rearguard actions.
- 1570-06-28: Battle of Anegawa — In Ōmi, Oda–Tokugawa allied forces defeat the Azai–Asakura alliance, expanding their influence by securing northern Ōmi castles.
- 1570-07: Consolidation of Tokugawa Ieyasu’s Power — Capitalizing on victory at Anegawa, Ieyasu strengthens control in Mikawa and Tōtōmi, subduing rivals and building new castles.
- 1570-08: Outbreak of Ishiyama War — Kennyo of the Ishiyama Hongan-ji in Settsu rises against Nobunaga, starting a prolonged war involving Ikkō sect followers.
- 1570-09: Battle of Noda-Fukushima — In Settsu, Oda forces attack strongholds of the Miyoshi Triumvirs and Hongan-ji, but retreat when Azai–Asakura advance south.
- 1570-10: Siege of Shiga — In Ōmi, Oda clashes with Azai, Asakura, and Hongan-ji forces near Sakamoto–Ōtsu. Mediated by Enryaku-ji, the stalemate continues into the following year.
- 1570-冬: Stabilization by Nanbu Harumasa — Nanbu clan eases conflict with Andō in Tsugaru, maintaining control over northern trade routes.
- 1570-夏: Counterattack by Amago Katsuhisa — Supported by Hashiba Hideyoshi and Yamanaka Yukimori, Amago forces resist in Tajima and Izumo but fail to break Mōri defenses.
- 1570-春: Defense of San’in by the Mōri — Mōri Terumoto fortifies Gassan-Toda Castle to block Amago remnants and Oda advances.
- 1570-秋: Chōsokabe Motochika’s Progress in Tosa — Motochika subdues local lords, securing a foothold for advance into Awa and pressuring eastern Shikoku powers.
- 1570-秋: Northward Advance of Shimazu Yoshihisa — Having nearly unified Satsuma and Ōsumi, Shimazu expands influence into Hyūga, escalating tensions with Ōtomo.