Only by understanding the nature of war can we learn the natural laws of war. Like other natural law, these are precepts or rules we can derive from observation and the use of reason. These natural laws of war may vary in application, but are applicable everywhere, at all times. The first rule is that, "Young men die." It is not a matter of choosing to follow them. They describe war as it is and always has been. History demonstrates that any success gained while ignoring any of these rules will be difficult and any victory will be temporary. Citizens of a republic should understand these fundamental natural laws of war and be on alert when anyone proposes to use military force.