Final answer:
A person with military support in power is typically found in a dictatorship, where a single person or small group holds complete authority.
Step-by-step explanation:
A person in power with the military behind him is found in a system of rule known as a dictatorship. This form of government is characterized by power held by a single individual or a very small group, and it wields complete and absolute authority over the government and population. Dictators may rise to power through various means, including economic and military might, often using intimidation and violence to maintain control and suppress opposition. Unlike a democracy, which strives to provide equal voice for all citizens, or oligarchies, where a small elite group holds power, a dictatorship is more autocratic and centralized in nature.