For their contemporaries and for military specialists there is no doubt: during the 16th and 17th centuries the Spanish Tercios were the best military infantry units in the world. What were the Tercios? How were they born, what did their operation and structure consist of? How did the participants of the most powerful and most famous infantry units that the armies of the Catholic King lived and died? Anything you could ask about this exceptional military machine is answered in Tercios de España