Sometimes referred to as the first published manual of guerrilla warfare, Bernardo de Vargas Machuca's Indian Militia and Description of the Indies is actually the first known manual of counterinsurgency, or anti-guerrilla warfare. Published in Madrid in 1599 by a Spanish-born soldier of fortune with long experience in the Americas, the book is a training manual for conquistadors. The Aztec and Inca Empires had long since fallen by 1599, but...