On July 17, 1936, the curtain rises: the world is once again a hostile and dangerous place to live... The Great History of the Civil War is the first great documentary series that addresses the Spanish conflict, not only from its perspective political and military, but also from its international implications. A war to which nations joined that, with their intervention, changed not only the destiny of this country, but also the international order, on the eve of World War II. The Spanish Civil War was the last war of ideals, where Spaniards and foreigners fought to impose their political and social models for the new centuries. For the first time. men of more than 20 nationalities came to Spain to fight for their ideas. It was the end of a way of making and feeling war between peoples and opened a new conception of modern warfare, where technology and military tactics definitively changed the way of understanding war.