G3 Military Assessment Survey

The G3 Military Assessment Survey was a unit in the Sontaran military, apparently responsible for threat assessment of possible targets. In 10,000 CE, One of their officers, Field Major Styre lured a group of soldiers from GalSec to an abandoned Earth in order to assess Humanity's military skills in case the Sontarans decided to invade. (DW: The Sontaran Experiment)