Commander (noun)

1. A person in charge of a military unit.
2. A person who gives orders and makes decisions.

Origin:

Late middle english: from old french commandeor, from commander (see command).

Examples:

1. The commander of the platoon was wounded in the battle.
2. The commander made the decision to retreat.
3. She was appointed commander of the naval base.
4. The commander issued orders to his troops.
5. The commander's commands were obeyed without question.