Video - War of Cards and Dolphins

Did you know that during the Vietnam War, American soldiers would sometimes use playing cards as a form of psychological warfare? They would leave the cards with a message written on them in Vietnamese, such as "Surrender or die," to intimidate their enemies. In another bizarre tactic, the US military experimented with using trained dolphins to detect underwater mines in the rivers of Vietnam. This unconventional approach to warfare shows just how unpredictable and strange the events of history can be. So next time you think you've heard it all, remember the unusual stories that happened during the Vietnam War.