As U.S. agitators for war well knew Know , U.S. naval power would prove decisive , allowing Preventing_or_letting expeditionary forces to disembark Arriving in Cuba against a Spanish garrison already facing Perception_active nationwide Cuban insurgent attacks Attack and further wasted Expend_resource by yellow fever .

After the storm it was feared that the existing Presence dengue fever epidemic on the island would spread Cause_change_of_position_on_a_scale .