Throughout Valoran, the resolve of Demacia's military is alternately celebrated or despised, but always respected. Their zero tolerance moral code is strictly upheld by civilians and soldiers alike. In combat, this means Demacian troops may not make excuses, flee, or surrender under any circumstance. These principles are espoused to their forces by unrivaled demagogues who lead by example. Garen, the valiant warrior who bears the title the Might of Demacia, is the paradigm to which these leaders are compared.
Source: The Game Website.