Praetorianism means excessive or abusive political influence of the Armed Forces in a country.
Daniel R. Headrick, professor of History and Social Sciences at Roosevelt University, describes praetorianism as a type of militarism oriented to the interior life of a nation, often related to minor countries, that does not aspire to fight or win international wars, but instead to maintain its influence in the domestic political system, controlling decisions that could affect the interests of the military as a corporation, or supporting some particular political faction or party.
References
Praetorianism Wikipedia(Text) CC BY-SA