Tech Infantry is the most advanced fighting force ever in the history of humanity. Made up of drafted mages, werecreatures, and occasionally other arcane creatures (including, for a brief period, ghouls), the Tech Infantry has been called upon by the Earth Federation to seize planets, put down uprisings, police starships, and occasional special missions. Created in 2002 by the United Nations to fight Gehenna and the Arachnid, it literally created the Federation. It continues to have fought many threats over its almost three hundred years of service.
There are serious ethical issues in forcing awakened humans to fight for five years before they are allowed to be citizens, while the rest of humanity was exempt. Generally the Earth Federation justified the draft by "protecting" its citizens from uncontrolled beings with amazing power--while simultaneously indoctrinating them to serve the Fed.