The unexpected resistance from the cluster cities stalled their destruction. If the paramilitary didn't risk and laid down their lives, humanity would've received a big blow on the very first day of the war. Then, it'd have just been a matter of time before Neptune fell and erased any chances of human survival.
But the cluster cities held on. Hundreds of thousands died. Each of them was a hero. An unnamed hero.
Even if humanity survived this war and a military funeral was held, they would only receive the most basic martyr send-off. Except for their families and friends, no one would remember or even know of their sacrifices.
Unlike a level 9 powerhouse or a rising genius, their tales wouldn't be told in stories and movies. They'd be one of the many martyrs. Nameless. One in the crowd. Forgotten. Their glory wouldn't reach the people that were alive because of their sacrifice.