People like to overcomplicate life, so as to create all sorts of avenues and alleys that meander all over the place, that thereby go back and forth, as well as up and down, even though anyone of any real sensibility can clearly see that the destination desired is actually just straight ahead. For instance, think about this very carefully, if someone is rude and disrespectful to you, and you respond in kind, does the situation actually get better or does it get worse? Or consider if someone slaps you across your face, and you respond in kind, does this bring peace and satisfaction to each party, or does it get worse?
In point of fact, all things being equal, if you hit someone, they will hit you back. Of course, most of the time, things aren't equal at all, so that when you hit someone, and they don't hit you back, it isn't really correct to believe, that they somehow have recognized that you are right and that they therefore deserved it, though that is possible, but often they want to retaliate but do not have the resources to do so at the present time, or, at a minimum, they strongly desire to pay you back in kind, with an action similar to yours, if they can only find the necessary tools and the right time to do so.
The above suggests what should be fairly obvious to all, that a destructive war that kills and maims many, while also destroying infrastructure, and creating all sorts of havoc, will, in and of itself, not bring lasting peace. In fact, for the side that has been defeated by such, it will bring a certain resignation, signifying that they cannot overcome their opponent, but hardly recognition that war has somehow enlightened these people that they were in the wrong, and therefore they will now live peacefully with their erstwhile opponent.
There is a basic truism, known implicitly by all, which simply states that if you want more of the same, than all you have to do is to keep doing the same things that you have been doing, and you will expectantly get the same result. If, on the other hand, you want change, real fundamental change, than one of the parties, must make a change on their end in order to effectuate a different result. So that, those that conquer by the sword, must at some point, truly turn their swords into plowshares, and having done so, they will find that their mindset and the things that they do, day-by-day, will materially change from what it once was, into something more pacific, making for a more tranquil world. Of course, there are many that argue against this same point, indicating that a nation or a person must always have a strong defense at a minimum, in order to protect oneself from dangers, foreign and domestic, but mankind has tried this very same thing, under all sorts of different names and reasons, for millenniums, and to what effect, has all this accomplished?
In short, on the most fundamental level, you cannot end violence with more violence, though granted violence is very good at ending another person's life, or taking over another country's sovereignty, but having conquered through violence, this has created the seeds of yet more violence. To end violence, therefore, you must stop the act itself, and by doing that, by refusing to take up arms, by refusing to respond in kind, you may indeed lose your life, or even lose your country, but ultimately there will step-by-step, be birth real lasting peace, for like will, as surely as the morning follows the night, bring forth like.