Which 1590 siege ended Toyotomi Hideyoshi’s campaign to unify Japan?

The 1590 Siege of Odawara ended Toyotomi Hideyoshi’s campaign to unify Japan.

Hideyoshi surrounded Odawara Castle, the stronghold of the powerful Hōjō clan, in 1590. The siege followed his victories over other major regional warlords and was supported by a huge coalition army, as well as naval forces that blockaded the fortress. The Hōjō leadership eventually surrendered after several months.

Hideyoshi treated the defeated Hōjō leaders harshly, but many of their former territories were reassigned to Tokugawa Ieyasu. This transfer helped establish the Tokugawa family’s power in eastern Japan before the creation of the Tokugawa shogunate in 1603.

The siege is sometimes confused with the later sieges of Osaka, which ended the Toyotomi dynasty in 1615. Odawara instead marked the effective completion of Hideyoshi’s military unification of Japan, although the subsequent invasion of Korea began in 1592.