Why is it ok for soldiers to kill?

Soldiers are authorized to use lethal force as part of their duty to defend their nation and protect its interests, often under rules of engagement established by military law and international conventions. This authority is based on the principle of just war, which holds that armed conflict can be morally justified under certain conditions, such as self-defense or the protection of civilians. Additionally, soldiers operate under a command structure and are trained to make decisions in high-pressure situations where the use of force may be necessary to achieve strategic objectives. Ultimately, the legitimacy of their actions is often evaluated in the context of military necessity and adherence to legal and ethical standards.