España y la Guerra Civil Americana o la globalización del contrarrevolucionismo

What powerful reasons pushed hundreds of thousands of Europeans and, among them, a few hundred Spanish citizens to join the warring factions of the American Civil War? The answer to that question, when 150 years have passed since the capomulation of Appomattox, does not allow for simplifications: the migration question in 19th century Europe; the contextualization of the start of the American war in the sociopolitical framework of the Spain of 1861 or the pan-counter-revolutionism prevailing in that century, configure the cognitive perimeter that will allow us both to approach systematically the setting of Spanish volunteers in the confronted military units, as to the study of the most important battles in which our compatriots intervened in one episode more than was the reaction against liberalism and revolution throughout the nineteenth century.