"Except for Ending Slavery, Fascism, Nazism and Communism, War Has Never Solved Anything"
Interesting take and this reply is not a personal attack on you at all but simply musings on the statement.
On the surface what you have said is a reasonable enough assertion to have made but if we look deeper it is in fact not really all that accurate if we take the time to step away from the social programing each and every one of us has received from childhood.
The rise of Fascism/Nazism and Communism would not have happened if serious economic disparity had not been forced in each case, add to that ideological differences and profiteering you quickly come to the realization that war is not a solution but the inevitable result of a system break down.
Let me explain.
WW1 was more or less in fighting between the aristocracy of Europe (we could get into the ontonet treaties but for the sake of brevity they were more or less an excuse anyway). Regardless of Germany's guilt or innocence the net result of the the reparations was to burden them with a debt that was in retrospect a ticking time bomb.
To cut a long story short if the stock market had not gone tits up thanks to the greed of a few then Hitler would have remained little more than a fringe radical, as such the economic conditions created by the depression in Germany were the perfect breeding ground for Fascism to rise in this case. For sure War ended Fascism but war is the net result of a system fail and the sad extension of a lack of foresight and ethical leadership be it political or economic.
Ultimately the ideology had to be exterminated and war of course was the only means left to do so but all of that aside the war and the rise of the Nazis should never have happened in the first place.
War is very profitable for a few and in both WW1 and WW2 there are many examples of American (and others it is true) industrialists taking advantage of these situations and trading with both sides, hence we should all be very weary of those that sound the drums of war for in most cases the reasons are economic ones wrapped up in an ideological smoke screen. Take the time to think of recent wars that have been conducted this way... I can think of one or two.
As for the rise of so called Communism a fresh look is required.
Communism you may be surprised to learn existed in Russia for only a very short time, when we use the word Communism in regrades to Russia what we are in fact talking about is Bolshevism which is a dictatorship of the proletariat and Totalitarian by nature.. That is not Communism it is Totalitarianism with communist window dressing.
All of that aside Communism happened in Russia because of the aristocratic oligarchy's ignorance to the needs of the people, pure and simple it was the extreme economic disparity that was ultimately at the root cause of its rise.
So is Communism in fact bad?
Well to be blunt no one really knows because Communism has not really been tried as it has in each case become totalitarian and personally I doubt it would work anyway (Marx was an idealist but I digress).
To underscore what I mean, all regimes that call themselves Communist have not really been communist at all, Russia was Soviet Communism which is just a utilitarian way of saying totalitarian, Cuba is not Communist even if they call themselves that they are but again Totalitarian, China is much the same and as for North Korea a Necrotocracy (cult of a dead leader) would be a more fitting label.
Now has war ended communism the same way that war ended Fascism? nope not at all because if we insist on calling all the others communist then it has not worked thus far in removing the ideology yet now has it.
So then should we fight wars against them?
Well that depends on your point of view really and as such any war is purely an ideological driven one.
But what if the war is to be about human rights and freedom? Well then just maybe as the others have a fairly dismal track record in this department much like Soviet Russia had, but freedom form what exactly? and who is saying these people need to be free and what are the motives of the people in power calling for such war to happen?
(I guess in the case of North Korea an argument could be made that war may be the only option in the long run for the nation to enter the 21'st century and develop but that is an aside.)
This is where things start to get really really sticky.
Communism was a dead end in Russia and it was ultimately economics that brought it to its knees, the system was brutal and ultimately vulnerable to stagnation as a political system and don't even get me started on human rights.
But you know one must really check to see if there is blood on their own hands before we start throwing around the human rights card because the west has been very dismal in this department itself in the past and very much of late.
So when it comes down to it, in the end, do we have a right to tell any other nation what political system they can or can not have? Or is it that those with a vested interest in financial gain wish for war to either make profit from it or remove a political system that is not conducive to said profit making in the first place? The cold war was very much an economic war punctuated with proxy hot wars and super power entanglements (Vietnam for the US and Afghanistan for Russia) but make no mistake that economics was very much a main player in this.
If we are then to say that war stopped Communism are we saying that it stopped its spread? Well yes we could argue this in the case of Malaysia, Afghanistan and to a degree Korea, but then what of Vietnam? and lets face it democracy is not really doing all that well in Afghanistan either now is it.
In a nutshell if war is the answer then we are asking the wrong question.
Just some things to think about and really it is only a rough sketch of things.
Oh and by the way I have the up most respect for the men and women that have fought and died in all of these wars as they are not the cause of it only the pawns in the game, so when you meet a veteran thank them and take time to honor them on your given remembrance days wherever you may live.