the last book I ever read (The Basque History of the World: The Story of a Nation by Mark Kurlansky, excerpt five)

from The Basque History of the World: The Story of a Nation by Mark Kurlansky:

Nothing so illustrates the romance of the Carlist cause as their hat, the Carlist trademark, a large red beret. The Carlists brought the beret into fashion in Europe, and it has never since gone out of style. Although the first known used of the word beret dates to a 1461 text in Landes, and through Gascognes and others in the region had worn this hat of unknown origin, there has been a long-standing association between Basques and berets. Jesuit novices wore a birette, and a bas-relief in Tolosa dated 1600 shows berets. The Carlists wore it in red, the color traditionally worn on Basque holidays, and made it their own. La Boina, “the beret,” was the name of a Carlist newspaper, and it was during the First Carlist War that the French began referring to the hat, as they still do, as le beret Basque. Since the First Carlist War, the hat not only has become a central symbol of Basqueness but has also gained international popularity and is generally associated with the political left. Argentine leftist revolutionary Ernesto Che Guevara saw no contradiction in using the image of the beret, because it is the hat of the underdog fighting the establishment.