A more thorough explanation:

Definition: A military objective is an object that is used for military purposes, located in a military area, or contributes to military action. These objects can be attacked during a war or conflict. According to the Geneva Convention Protocol 1 (1977), only military objects can be targeted, not civilian objects.

• A military base
• A weapons factory
• A communication center used by the military

These examples illustrate the definition of a military objective because they are all objects that are used for military purposes or contribute to military action. They can be targeted during a war or conflict because they are considered legitimate targets under international law.