After the opening battle of the Third Shinobi World War, the "Dawn Battle," concluded perfectly, Uchiha Yue led the three members of Team "Moon" under his command and formally occupied Kirigakure's camp at the border of the Land of Water. However, this was merely Kirigakure's first line of defense within the Land of Water. Even though Uchiha Yue had already led Team "Moon" to seize this place, breaking through the Land of Water's defenses would still require some time.
That was because Kirigakure's true line of defense in the Land of Water was not on land, but on the waterways. Uchiha Yue and Team "Moon" were currently only at the border between the Land of Fire and the Land of Water. Yet to truly travel from the Land of Fire to the Land of Water, they still had to cross a stretch of water. That stretch of water was, in fact, Kirigakure's real defensive line along the Land of Water's border.
During the previous two Shinobi World Wars, Konoha had attempted to advance across the water and attack directly into Kirigakure's territory, only to suffer heavy losses without ever fully entering the Land of Water. This showed that Kirigakure's defenses on the waterways were its true border defenses in the Land of Water. If Uchiha Yue wanted to break through that line, he would need to wait for support from Konoha's rear forces.
Of course, Uchiha Yue's true objective had never been to lead Konoha's ninja forces into the Land of Water. If it were just Uchiha Yue and the members of Team "Moon" infiltrating the Land of Water, it would not take much effort at all. They only needed to be careful of the hidden sentries Kirigakure's ninja had deployed.
Thus, what Uchiha Yue was truly waiting for in