Take an analogy of a violent caged beast.
Have you seen a violent beast in captivity before?
At every opportunity that they have, they tend to be overly aggressive. This was simply because said beast was never meant to be in captivity, they hated it.
For 18 years, Cold Town and its elite army had been in captivity inside their own land. They were caged inside their own home.
For 18 years, they suffered this unbearable injustice.
But finally, after 18 years, it was time to exact revenge.
This was why they did not hold back; they could not hold back even if they wanted to, the drums of revenge and liberation drumming through their hearts pushed them into the current rampage across this 1-story building.
Was Cheetah's ingenious attack working?