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Author: WikiMatrix
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English[en]
In captivity he studied military science, and also geometry by the way of Euclid, history of Tacitus, and Vitruvius' architecture, all the while planning his great work on war.
Spanish[es]
En la cautividad, estudió ciencias militares y también geometría de Euclides, historia de Tácito y arquitectura de Marco Vitruvio.