Four days after he left Maracaibo, Morgan returned. He was told that a Spanish defence squadron, the Armada de Barlovento, was waiting for him at the narrow passage between the Caribbean and Lake Maracaibo, where the San Carlos de la Barra Fortress was sited. The forces, under the command of Don Alonso del Campo y Espinosa, had 126 cannon with which to attack Morgan, and had re-armed San Carlos de la Barra Fortress. The Spaniards had orders to end piracy in the Caribbean, and negotiations between Morgan and Espinosa continued for a week. The final offer put by the Spanish commander was for Morgan to leave all their spoils and slaves and to return to Jamaica unmolested, but no agreement was reached that would allow Morgan and his men to pass the fleet with their spoils but without attack. Morgan put the Spaniards' offers to his men, who voted instead to fight their way out. As they were heavily outgunned, one privateer suggested that a fire ship aimed at Espinosa's flagship, "Magdalen" would work.