commander, command

Definition:

the term "commander" refers to a leader of an army who is responsible for leading and commanding a certain group of soldiers.

To "command" an army means to lead and be in charge of the army.
A commander could be in charge of a small group of soldiers or a large group, such as a thousand men.
This term is also used to refer to Yahweh as the commander of angel armies.
Other ways to translate "commander" could include, "leader" or "captain" or "officer."
The term "to command" an army could be translated as "to lead" or "to be in charge of."