I'm not sure chivalry and defensiveness are the right criteria for determining whether a military action is a just one. Chivalry basically just refers to acting with respect or honor towards the opposing military. And defensive battles isn't any sort of criteria. One can and should launch all kinds of offensive actions in the course of a defensive war. War isn't standing around waiting until you get shot at before engaging. It is about surprise and maneuver as well. Arguably bringing a war to a faster end through sophisticated tactics is more humane than letting it drag on and on and on because you only engage in ineffective static defensive battles.ken_sylvania wrote: ↑Mon Aug 11, 2025 8:06 amIf an army general operates his army according to generally accepted standards of chivalry, fighting only defensive battles, no matter how successful he is, can you imagine our Lord saying "come, ye blessed of my father, inherit the kingdom"?
Modern international humanitarian law basically has 5 principles for determining if a military action is just or legal.
Necessity: Is war a legitimate defensive one and are the individual actions within that war necessary for achieving that objective? So, for example, a war may be militarily necessary to defend a country from invasion, but blowing up churches or civilian infrastructure isn't necessary for achieving that objective.
Distinction: Are the combatants distinguishing between military targets and protected civilians? Bombing or massacring (or otherwise mistreating) civilians violates that principle. As does destroying civilian infrastructure for no legitimate military purpose. So blowing up a civilian railway bridge might have a legitimate military purpose. But blowing up a civilian hospital or school would not.
Proportionality: Is the action proportional to the military objective? Blowing up an entire city to destroy some military target on the edge of town would not be proportional.
Humanity: This principle prohibits weapons or actions that cause injury of suffering that is disproportionate to their military utility. This principle led to the prohibition on the use of chemical weapons, for example.
Honor: This is what you are calling chivalry. It is about treating opponents with respect, not mistreating prisoners of war or killing troops who have surrendered. That sort of thing.
Arguably the combatants in the current Ukrainian and Gaza conflicts are violating multiple of these principles if not all of them.
Likewise, war is not the only public action that can result in the death or suffering of others. Is there a moral difference between a politician who choses to cut off medical care for vulnerable sick people knowing that his actions will result in death and suffering. Versus a general who engages in a battle that also results in death and suffering? I'm not so sure.