A more thorough explanation:

Military government is when the military takes control of a country's public functions or exercises governmental functions. This can happen during a foreign war or a civil war. The military commander takes over the government's actions, and their decisions are more important than local laws.

For example, if a country is facing a civil war, the military might take control of the government to restore order and protect the citizens. During this time, the military's decisions are more important than the laws that were previously in place.

Martial law is a type of military government that is imposed during wartime or when the rulers believe that civil government has failed. The army takes control of the country instead of the civil authority. Martial law is imposed to maintain public safety and security.

For example, if a country is facing an invasion or insurrection, the rulers might impose martial law to protect the citizens and maintain order. During martial law, the military has the power to enforce strict rules and take action against those who break them.

Overall, military government and martial law are used to maintain order and protect citizens during times of crisis. However, they can also limit individual freedoms and civil liberties, so they should only be used when absolutely necessary.