Since Hozuki Shingetsu had planned this whole drama before even leaving the village, how could he have failed to anticipate the scene where the Uzumaki Clan, pressured by the Lightning-Earth Allied Forces, agreed to join Kirigakure and came under attack?
On the very night Hozuki Shingetsu decided to ambush the Konoha envoys, he had already sent a Ninja Hawk to carry the news back to Kirigakure. Of course, the message wasn't for Ren, but for his own father.
If he'd left it to Ren, the chances of Kirigakure sending anyone out would have been next to zero. But when the message went to his father, Hozuki Shingetsu's advance warning and Yukinagi's identity all factored in. The Hozuki Clan and the Yuki Clan sent every ninja they could muster, crossing the sea to provide emergency support at the last possible moment.
It could be said that this was a huge slap in Ren's face, but it didn't matter. As long as the Uzumaki Clan successfully joined Kirigakure and they managed to create a Tailed Beast Jinchuriki, no one would care about what had happened except Ren and the Kaguya Clan.
With reinforcements from Kirigakure assured, Hozuki Shingetsu naturally began thinking about how to swallow this entire enemy force. If the Second Shinobi World War broke out and the Land of Wind, Land of Earth, and Land of Lightning all attacked Konoha at once, Konoha might actually be in danger.
If Konoha truly fell, that would be no good for Hozuki Shingetsu, who had worked so hard to create chaos and conflict across the Shinobi Continent.
So he'd take this enemy force for himself! He'd consider it compensation for the trouble he'd caused Konoha.
This great river was the burial ground Hozuki Shingetsu had carefully chosen for the Lightning-Earth Allied Forces.
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