The number of troops is too large. If these were regular troops, amassing this many all at once would be simply unfeasible. Logistics aside, even coordination among the troops themselves would be extremely problematic.
Even though these soldiers were produced via special buildings, coordination still took two days.
Similarly, the response from the opposite side wasn't so quick either, not because they didn't want to, but because they fundamentally couldn't.
Such massive troop movements aren't something you can just decide to do on a whim. Additionally, Kapala Island is currently under attack; they still have many areas that need troops, and it isn't possible to dispatch them all.
Two days later, the integrated troops began their attack, leaving behind a large expanse of temporary camps.
These camps wouldn't lose their function, as they were only the first wave of people to arrive on the island, with a second and third wave to follow.
