Operation Verano ([beˈɾano], "Operation Summer") was the name given to the summer offensive in 1958 by the Batista government during the Cuban Revolution, known to the rebels as La Ofensiva. The offensive was designed to crush Fidel Castro's revolutionary army, which had been growing in strength in the area of the Sierra Maestra hills since their arrival in Cuba on board the Granma yacht in December 1956.