The 1582 was part of a border dispute between two ''

daimyō were powerful Japanese magnates, feudal lords who, from the 10th century to the early Meiji era, Meiji period in the middle 19th century, ruled most of Japan from their vast hereditary land holdings. They were subordinate to the shogun and no ...

'' of Japan's

Sengoku period The was the period in History of Japan, Japanese history in which civil wars and social upheavals took place almost continuously in the 15th and 16th centuries. The Kyōtoku incident (1454), Ōnin War (1467), or (1493) are generally chosen as th ...

. The territories of

Oda Nobunaga was a Japanese ''daimyō'' and one of the leading figures of the Sengoku period, Sengoku and Azuchi-Momoyama periods. He was the and regarded as the first "Great Unifier" of Japan. He is sometimes referred as the "Demon Daimyō" and "Demo ...

and the

Uesugi clan The is a Japanese samurai clan which was at its peak one of the most powerful during the Muromachi period, Muromachi and Sengoku periods (14th to 17th centuries).Georges Appert, Appert, Georges. (1888) ''Ancien Japon,'' p. 79./ref> At its heigh ...

, led by

Uesugi Kagekatsu was a Japanese samurai ''daimyō'' during the Sengoku and Edo periods. He was the adopted son of Uesugi Kenshin and Uesugi Kagetora’s brother in law. Early life and rise Kagekatsu was the son of Nagao Masakage, the head of the Ueda Naga ...

, met in Etchu Province; both were under threat from the

Ikkō-ikki were armed military leagues that formed in several regions of Japan in the 15th-16th centuries, composed entirely of members of the Jōdo Shinshū sect of Buddhism. In the early phases, these ''ikki'' leagues opposed the rule of local Shugo, go ...

of Etchu, and from one another. Seeking to ensure the security of Nobunaga's possessions,

Shibata Katsuie or was a Japanese samurai and military commander during the Sengoku period. He was retainer of Oda Nobuhide. He served Oda Nobunaga as one of his trusted generals, was severely wounded in the 1571 first siege of Nagashima, but then fought ...

and

Sassa Narimasa was a Japanese samurai lord of the Sengoku through Azuchi–Momoyama periods. He entered Oda Nobunaga's service at the age of 14 and remained in his service throughout Nobunaga's rise to power. He was a member of the so-called Echizen Sannin ...

, two of his chief generals, rode north from

Toyama Castle Toyama Castle moat is a flatland-style Japanese castle located in the city of Toyama, Toyama Prefecture, in the Hokuriku region of Japan. It is also called Azumi Castle (安住城 ''Azumi-jō''). Built in 1543, the castle and its surrounding ...

, and laid siege to both the town of Uozu and nearby Matsukura Castle. Uozu fell on June 3, 1582, and Oda Nobunaga would die eighteen days later, in Kyoto, in the

Incident at Honnō-ji The Incident Command System (ICS) is a standardized approach to the command, control, and coordination of emergency response providing a common hierarchy within which responders from multiple agencies can be effective. ICS was initially develope ...

References

1582 in Japan Sieges of the Sengoku period Attacks on castles in Japan Conflicts in 1582 Uozu, Toyama Etchū Province 16th-century military history of Japan Military history of Toyama Prefecture {{Japan-battle-stub