In modern history of the humanity, the twentieth century was marked by several lasting international military conflicts and civil wars, which caused millions of people’s deaths, devastation, hunger and a lot of other social problems. Those include, first of all, such global armed conflicts as the First World War (1914-1918) and the Second World War (1939-1945), as well as numerous national revolutions, Arab-Israeli conflicts, African and South American civil wars, recent liberation wars and so on.

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