Nagashino: The Day the Cavalry Died

On the morning of May 21, 1575, on the Shitaragahara plain in Mikawa Province, Takeda Katsuyori's army of roughly 15,000 faced the combined Oda-Tokugawa force of roughly 38,000. The night before, the coalition had erected two parallel rows of horse-stopping palisades. Behind those palisades, three thousand matchlock infantry were deployed in three ranks. Katsuyori chose to attack head-on.

Why Katsuyori Attacked

Recent scholarship reads Katsuyori's decision not as simple recklessness but as a tactical bind. The Takeda were besieging Nagashino Castle, still in Tokugawa hands, and could not afford a long stand-off while Oda-Tokugawa reinforcements continued to arrive. Several of Katsuyori's senior generals counselled withdrawal. The combination of strategic constraint and the momentum of the Takatenjin victory the previous year pushed Katsuyori to risk a frontal assault.

Three Thousand Matchlocks

Nobunaga's deployment of three thousand matchlocks was the largest of the Sengoku. The classical 'three-rank volley' explanation has been challenged in recent research; the current reading is less of a single synchronized rotation than of multiple semi-autonomous firing cycles run by separate units. Either way, the Takeda cavalry took continuous fire from behind the palisades, and lost more than half its strength in the hundred metres of charge. Yamagata Masakage, Baba Nobuharu, Naitō Masahide, Hara Masatane, and many other senior generals of the Shingen era were killed.

After the Annihilation

Casualties at Nagashino exceeded a third of the Takeda army. What was lost was less the manpower than the personnel network and accumulated experience of the senior retainer class Shingen had built. Katsuyori tried to rebuild but Nobunaga's pressure never relaxed; seven years later the Takeda ended at Tenmokuzan. Nagashino is read in modern military history not as a single battle defeat but as the day Shingen's institutional inheritance was spent in a single morning.

"The three thousand matchlocks were arranged in two and three ranks, firing without pause."