Epidemic is on the Spaniards’ side
A Council of war was held on April 15, at which it was decided the only way San Felipe could be taken would be to bombard it from the ships in the bay. This, it was decided, would be too dangerous to the fleet. According to the English historians, the widespread dysentery, malaria and yellow fever had rendered their forces unfit for another frontal assault so the men and equipment were reloaded on the ships and preparations were made to return to England. It took them almost a month to get ready for sea and to destroy the forts that they had taken. On May 12, the last of the English had left and the siege of Cartagena was ended.


