Hive Soldier (Vanguard of the invasion force) They are bred for one purpose: To kill.

Colin Hewette: US Aerospace Engineer and Marina Asamova: Russian-Ukrainian Radio Astronomer
The Earth, next world selected for conquest
Suppose for a minute that the Aztecs or the Incas knew that Cortez or Pizzaro was on his way with the Conquistadors. They knew it weeks in advance and instead of welcoming them as gods, they met them with every weapon they had at their disposal. Don’t you think history would have been different?” The Hive poses this very question for mankind, for what if we were forewarned that a hostile alien race was about to exterminate us? An unmanned probe built by Russia and the United States on its way to the outer planets crosses paths with an alien device that’s been spying on us since the year 1908. This leads to the discovery of a fleet of insectoid aliens on their way to Earth. With three years warning, could we defend ourselves from an invasion by a horrific alien race?