Had Shingen been alive he would not have sent his Cavalry against a stockade with guns behind it, Katsuyori should have retreated, also there were Bowmen with the guns, has Shingen been alive Tokugawa would have been dead, things would have changed at Mikatagahara Shingen beat a combined force of Tokugawa/Oda Samurai, the oda Samurai were totally wiped out, and so were the Tokugawa or they would have been had Ieyasu not been forced to retreat, the oda Tokugawa alliance Never beat Shingen..