Rumor had it that the Uchiha Clan's Sharingan could control Tailed Beasts, but throughout history, only Madara Uchiha had ever used his Sharingan to control the Nine-Tails in battle.
As for the other Tailed Beasts, none seemed to have been visibly controlled.
If an ordinary Sharingan could control Tailed Beasts at will, the Uchiha Clan would have been invincible during the Warring States Period. All they would have needed to do was find the Tailed Beasts and bring them under their control. Who could have stood against them then?
Not even the Senju Clan could have beaten them. Madara Uchiha might not have been a match for Hashirama Senju, but he could still have kept him occupied. And apart from Tobirama Senju, which other member of the Senju Clan could have fought a Tailed Beast? Even with Mito Uzumaki, how many Tailed Beasts could she have faced back then?
That was why Hiruzen Sarutobi had never believed an ordinary Uchiha could control a Tailed Beast. Only the Mangekyō Sharingan could do that.
But did any Uchiha possess the Mangekyō Sharingan now? Perhaps Uchiha Yi had awakened it, but Hiruzen Sarutobi did not know for certain.
Nor did he know whether Uchiha Heitai had awakened the Mangekyō Sharingan.
The Uchiha Clan really is a source of instability. When will Uchiha Yi gain control of them? I need to deal with this threat as soon as possible and make the Uchiha loyal to Konoha.
The fighting on the Kirigakure front was also in full swing. To keep the war effort running smoothly, Mitokado Homura, an elder who had fought in the First Shinobi World War and earned great merit, had been appointed chief commander on the Land of Water front.
To help Mitokado Homura handle the situation against Kirigakure, Hiruzen Sarutobi had