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Helmuth Karl Bernhard, known as Moltke the Elder, was a Prussian general and military theorist who served as Chief of the General Staff from 1857 to 1888. He played a pivotal role in Prussia's victories in the Austro-Prussian War (1866) and the Franco-Prussian War (1870-1871), earning him the reputation as one of the greatest military minds of the 19th century.