sentences:  The three volumes of the series span the whole of almost one millennium of war between humanity and the Taurans, an extraterrestrial species that stays enigmatic throughout the series.Due to time dilation, the two main characters experience the whole of the war, biologically appearing to be in their early thirties at the end of the hostilities.The first volume mainly describes the training of the Earth elite force, and their first combat with Taurans, focusing on how military ideology is used to form humans into fighting machines, and in how typical the results end up being.