This book deals with a Series of military operations that occurred in Portugal in 1762 and 1763, during the Seven Years' War, and which have been largely dismissed by the historiography. They are collectively called the Guerra Fantástica ,'Fantastical War', given the fact that the military units of the countries involved carried out multiple movements while not engaging in any battle. This work begins with an introduction to the phenomenon of war as a whole, to the environment in Europe at the time, and to the military framework of the conflict. It then describes the events that led to the participation of Portugal in the Seven Years' War and the way in which the conflict in Portugal began. It continues with a presentation of the various forces involved.