The United States and Russian militaries train and employ dolphins for several reasons. Such miltary dolphins can be trained to rescue lost divers or to uncover underwater mines. Military dolphins were used during the First Gulf War. More controversal uses of military dolphins incude training them to lay underwater mines or to kill Vietnamese Skin Divers during the Vietnam War.
More controversial rumoured uses of militarydolphins include training them to lay underwater mines or to kill enemy combatants, or even civilians, such as Vietnamese skin divers during the Vietnam War.
The Russian military is believed to have closed its marine mammal program in the early 1990's.