[Kanji_The_Wanderer]

Are you referring to Uesugi Kenshin? The man who was labled the "The of War" as well as "The Bishimounten"? He faced his nemesis, Takeda Shingen in battle I believe a total of five times. Or perhaps six. They never desired to kill each other, they just wanted to use their strategies against each other, and battle for all eternity on the field.