| Masayuki was the 3rd son of [[Sanda Yukitaka]] ([[1512]]-[[1574]]) and like his father first served [[Takeda Shingen]]. His first taste of battle, in fact, is said to have been at the famous [[Fourth Battle of Kawanakajima]]. He became head of the Sanada after his two elder brothers, Nobutsuna and Masateru, were killed at [[Battle of Nagashino|Nagashino]] in [[1575]]. As the power of the Takeda declined, Masayuki expanded into [[Kozuke province|Kozuke]] and took [[Numata castle|Numata]] from the Hojo in [[1580]]. In [[1585]] [[Tokugawa Ieyasu]] demanded that Numata be returned to the Hojo as part of a Tokugawa-Hojo agreement signed that year. Masayuki refused and defeated a Tokugawa army sent to chastise him near Ueda after receiving the assistance of [[Uesugi Kagekatsu]]. Masayuki made peace with the Tokugawa by sending his son Nobuyuki as a hostage to Hamamatsu, and secured cemented an alliance with the Uesugi by sending his son Yukimura as hostage to Echigo. That same year, the Hojo had tried and failed to bring down Numata, which was held by Masayuki's uncle, [[Yasawa Yoritsuna]]. | | Masayuki was the 3rd son of [[Sanda Yukitaka]] ([[1512]]-[[1574]]) and like his father first served [[Takeda Shingen]]. His first taste of battle, in fact, is said to have been at the famous [[Fourth Battle of Kawanakajima]]. He became head of the Sanada after his two elder brothers, Nobutsuna and Masateru, were killed at [[Battle of Nagashino|Nagashino]] in [[1575]]. As the power of the Takeda declined, Masayuki expanded into [[Kozuke province|Kozuke]] and took [[Numata castle|Numata]] from the Hojo in [[1580]]. In [[1585]] [[Tokugawa Ieyasu]] demanded that Numata be returned to the Hojo as part of a Tokugawa-Hojo agreement signed that year. Masayuki refused and defeated a Tokugawa army sent to chastise him near Ueda after receiving the assistance of [[Uesugi Kagekatsu]]. Masayuki made peace with the Tokugawa by sending his son Nobuyuki as a hostage to Hamamatsu, and secured cemented an alliance with the Uesugi by sending his son Yukimura as hostage to Echigo. That same year, the Hojo had tried and failed to bring down Numata, which was held by Masayuki's uncle, [[Yasawa Yoritsuna]]. |