Even among members of the same clan, the Sharingan was not something that just any Uchiha could use interchangeably.
Every Sharingan was unique, and the closer the blood relation, the weaker the rejection.
The original work never introduced Uchiha Izuna's wife, but he actually had direct descendants. They simply were not described in much detail.
The Uchiha Clan had quite a few Three-Tomoe Sharingan in storage. Before dying, a small number of elderly clan members had gouged out their own eyes and offered them to the clan.
They hoped that even after they were gone, their eyes could take their place and continue protecting the clan's safety.
However, most Uchiha clan members took their Sharingan with them into their graves.
The pair prepared by Fugaku Uchiha was only one of them. The battlefield was ever-changing, and he did not want to lose Uchiha clan members with Three-Tomoe Sharingan, let alone powerful clan members with Mangekyō Sharingan.
After the forbidden technique Izanagi was made available, Fugaku Uchiha had also rewarded more than ten Sharingan to clan members who had rendered great service and saved the lives of many others.
After seeing the clan head completely revive Uchiha Izuna, Fugaku Uchiha immediately had someone deliver these eyes to him.
Given Ancestor Uchiha Izuna's personality, he was surely inclined toward the clan. As for Madara Uchiha's opinion, it was no longer important.
Most of the records concerning Madara Uchiha had been destroyed, but the few remaining accounts all mentioned that he basically never opposed Uchiha Izuna in any decision—a confirmed brother-complex case.
As long as they had Uchiha Izuna firmly in hand, that formidable fighting force, Madara Uchiha, would naturally be put to use by the Uchiha Clan.
At that moment, the battle grew increasingly fierce.
The area affected by Madara Uchiha and