In actuality, the player legion's combat strength was extremely formidable. With formations arranged based on class roles—tanks, damage output, healing relying on each other—as long as it wasn't a crushing situation, it was absolutely a top-tier legion.
But the problem was that the United Army organized formation configurations for the convenience of summoning legions and under the pressure of time. They even adjusted while on the march, all for the purpose of quickly summoning the corresponding legion without causing chaos, efficiently taking down Starfire's walls, and then determining victory or defeat in one battle.
The idea was good, in fact, many guild sieges were conducted in this way, after all, the summoned legion was the main force.