Uesugi Kagekatsu
The 1578 took place following the sudden death of Uesugi Kenshin, one of Japan's greatest warlords. Kenshin had requested that the inheritance be split between his nephew, Uesugi Kagekatsu, and his adopted son Uesugi Kagetora. This conflict happened because of neither heirs being birth with the Uesugi name. Kagekatsu was the biological son of Nagao Masakage and Kagetora was biological son of Hojo Ujiyasu.