United States Unrestricted Warfare in the Caribbean?

Twenty-first century equivalent of unrestricted submarine warfare? A little over a century ago, the United States joined Britain and France in their war against Germany. Many Americans in and out of government had sympathized with the Allies in their grinding war and were outraged by the murder of civilians in Belgium and Northern France by occupying German forces. What finally encouraged those recalcitrant to enter the war were the revelations that Germany was encouraging Mexico to join in the war against the US and the German decision to allow unrestricted submarine warfare against ships at sea. Contemporary laws of war codified in treaties in the late nineteenth century stipulated that civilian ships could not by sunk without warning. Germany's adoption of unrestricted submarine warfare unleashed submarines (U-boats) to sink any ship at sea without regard to combatant status or cargo. German WWI Submarine and sinking merchant ship Fast forward to the present d...