What Shikaku wanted was not to defeat the enemy. Konoha held an absolute advantage in the overall situation, so they only needed to drag the war into overtime. In the end, the Cloud Ninja, unable to sustain themselves, would taste the bitter fruit of crushing defeat because of their long supply lines.
All Shikaku needed to do now was safely deliver reinforcements from the frontline camps to the three battlefields.
How to do it was actually simple. There was no elaborate plan, yet it could make the enemy extremely uncomfortable.
Of course, only Konoha could pull this off—by relying on the Byakugan's scouting ability. With that ability, it was difficult for anyone to successfully launch a perfect ambush.
The reinforcements would be divided into two groups. After the first group set out, the second would depart after an interval. If the Cloud Ninja attacked when the first group arrived, there would certainly be an ambush. But no ninja was some cannon fodder from a hack-and-slash game; they could hold out for several exchanges. At that point, the second group would receive a warning from the first and rush to the battlefield. If things went well, the ambushed Konoha Ninja might even turn the tables with a rear assault or a strike at the enemy's center.
And if the Cloud Ninja held back and let the first group pass, focusing instead on attacking the second, then the first group would receive the warning and make a return charge, continuing with the same rear assault or central breakthrough.
Even if the enemy's ambush was patient enough to camp in the bushes for thirty years, solely to inflict maximum casualties on Konoha's fighting force, the first group would have already reached the battlefield safely. The main battlefield would then hold a numerical advantage,