write about world wars in like a summary
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In terms of human technological history, the scale of the two world wars was enabled by the technological advances of the second industrial revolution and the resulting globalization that allowed global power projection and mass production of military hardware, but wars on such a scale have not been repeated due to the onset of the atomic age and the resulting danger of mutually assured destruction. It had been recognized that the complex system of opposing alliances — the German, Austria-Hungarian, and Ottomanempires against the British, Russian, French empires was likely to lead to a world-wide conflict in the event of war breaking out. Due to this fact, a very minute conflict between two countries had the potential to set off a domino effect of alliances, triggering a world war. The fact that the powers involved had large overseas empires virtually guaranteed that such a war would be world-wide, as the colonies' resources would be a crucial strategic factor. The same strategic considerations also ensured that the combatants would strike at each others' colonies, thus spreading the wars far more widely than those of pre-Columbian times.
Both world wars had also seen war crimes. The First World War had seen major use of chemical weapons despite the Hague Conventions of 1899 and 1907 outlawing the use of such weapons in warfare. The Ottoman Empire had been responsible for the death of over one million Armenians during the First World War.