If there was a pattern to the endless conflict, it was that battles overwhelmingly involved neighbors. You fought the person directly across the border, who had always been directly across your border. Or you fought someone inside your own borders: the Ottoman War of 1509 was between two brothers. Throughout the majority of human history, encounters—hostile or otherwise—were rarely between strangers. The people you met and fought often believed in the same God as you, built their buildings and organized their cities in the same way you did, fought their wars with the same weapons according to
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