“War is the father of all and king of all” (Kirk, 1954, p. 245) is what Heraclitus claimed and even if it might be quite exaggerating, it is not far from reality. War has always been central in shaping human affairs and it constitutes one of the most ancient forms of politics, since it has been used since time immemorial by human beings trying to impose their will on other neighbouring entities. War has largely contributed towards changing the form, structure and composition of both the entities launching it and those on which it was being imposed, while it was a result of war that modern states have been born and developed.