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The phalanx was an ancient formation of infantry in which soldiers stood shoulder to shoulder in rows of eight or 16, forming a solid block that could sweep through the more dispersed ranks of the enemy. First used by the Sumerians and fully developed by the ancient Greeks, the phalanx reached its apex when Philip II and Alexander the Great used the great Macedonian phalanx to conquer all of Greece and the Middle East. Soldiers in their phalanxes were armed with the sarissa, which was what? Discuss
Source: The Free Dictionary