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e.g. Yugoslavia, Rwanda, East Timor, first Gulf war (possibly)

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The consequences of such war can result in mutually assured destruction.

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The allies failed to reconcile with Germany, and stop its advancement across Central Europe

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fear of religion

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Use of modern weapons (WMDs, tanks, planes, bombs, s

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Use of modern weapons (WMDs, tanks, planes, bombs, s

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Weapons become less targeted, but human strategy and ambition became more targeted

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Weapons become less targeted, but human strategy and ambition became more targeted

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Ulterior motives for war

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The result of such war was that soldiers and leaders were being held accountable for their actions - Eg Nazis being held on trial

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That would be as a result of the availability of modern technologies and weaponary, such as: nuclear weapons, biological weapons, etc.

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morality of going to war

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massive constructions for god and kings- castles and churches 

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massive constructions for god and kings- castles and churches 

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Role of international institutions/bodies (or rather, lack of intervention)

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Role of international institutions/bodies (or rather, lack of intervention)

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Eg League of nations

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Existence and implementation of International Law

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Existence and implementation of International Law

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warfare tradition- requirements of becoming a knight- dedicating your entire life to it from and early age

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warfare tradition- requirements of becoming a knight- dedicating your entire life to it from and early age

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Modern wars are fought mainly on moral grounds, one ideology versus another. E.g. ISIS, Al-Quaeda

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Use of slaves/gladiators to showcase their wealth and influence 

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Use of slaves/gladiators to showcase their wealth and influence 

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To gain power and expand their empire

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War is suddenly not a noble nor good thing

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War is suddenly not a noble nor good thing