The Third Hokage had decided to take the field personally. The higher-ups were still keeping it secret, so Hagoromo naturally had no way of knowing. Still, he understood that the second large-scale war he would experience was about to begin.
Even though only around ten days had passed since the first battle.
At this time, Konoha's ninja were actively making preparations for war. They had only three short days.
Though he would not be fighting on the front lines, Hagoromo still methodically made his own preparations, including replenishing ninja tools and medicine.
As for Konoha's command system, aside from ensuring wartime logistics, its most important task was reorganizing the ninja. They were assigned into reconnaissance units, strike units, support units, and so on according to the ninjutsu they excelled in. And that was not all—they had to be further divided. Strike units, for instance, were split into close-range attack units, mid-range support units, long-range assault units, and more.
The more detailed the unit organization, the more flexibly Konoha's command system could direct them. At the same time, it meant more complicated work and a heavier burden on the command structure.
If they were divided too finely, orders during battle would certainly be transmitted more precisely, but the more endpoints there were in the chain of command, the easier it was for mistakes to occur.
Of course, none of that had anything to do with Hagoromo. He was merely a tiny cog in Konoha's massive war machine. He would turn however others arranged for him to turn, and there was no need for him to concern himself with the rest.
If Hagoromo had not been injured, he would likely have been placed in a close-range unit. He might even have had a chance to follow the Third Hokage into the enemy