Eager To Fight

Sensing that the time was ripe, Aamir ordered to detonate all the explosives that they had buried around the perimeter of the city. The explosion shook the ground like an earthquake, as the explosion tore open a few openings in the Zergs' marching column. But, the rest of the Zergs quickly filled in the gaps. 

They marched like migrating ants on a prairie, destroying everything along their way. They felt no fear, and their only goal was to move forward and destroy.

Although the primitive Zergs had evolved in some respect, their habits largely remained the same on the battlefield. 

The Zergs had started the war without any drum beats or inspiring speeches before the battle. Under the command of dark ones, the primitive Zergs marched forward, trampling on top of their own kind's dead bodies without any feelings. Soon, the Zergs breached the city wall and finally brought the battle into the city.