Zanfarar

Zanfarar was one of the three most important Ziggurats in the whole alien fleet. It was the place where leeches were given birth to, and the place they were put into capsules and tossed into the earth to possess humans. 
Zanfarar was destroyed after getting caught in Xianfar's explosion. Its destruction signaled the end of the leeches' attack on the remaiining human population, giving the few remaining human survivors a chance to defend themselves against the other alien forces. Although thsi was ahuge setback, andthe aliens lost a sure way of winning the war, it didn't scare them as they continued intruding earth through other means