Anti-tank dogs:
Hungry dogs with explosives
Anti-tank dogs, also known as dog bombs or dog mines, were hungry dogs with explosives harnessed to their backs and trained to seek food under tanks and armoured vehicles. By doing so, a detonator (usually a small wooden lever) would go off, triggering the explosives and damaging or destroying the military vehicle.
The dogs were employed by the Soviet Union during World War II for use against German tanks. The dogs were kept without food for a few days, then trained to find food under a tank. The dogs quickly learned that once released from their pens, food could be found under tracked vehicles. Once trained, the dogs were fitted with an explosive charge and set loose into a field of oncoming German tanks and other tracked vehicles. When the dog went underneath the tank—where there was less armour—the charge would detonate and damage the enemy vehicle.
According to Soviet sources, the anti-tank dogs were successful at disabling a reported three hundred German tanks. They were enough of a problem to the Nazi advance that the Germans were compelled to take measures against them. An armoured vehicle's top-mounted machine gun proved ineffective due to the relatively small size of the dogs and the fact that they were low to the ground, fast, and hard to spot. Orders were dispatched that commanded every German soldier to shoot any dogs on sight. Eventually the Germans began using tank-mounted flame-throwers to ward off the dogs. They were much more successful at dissuading the attacks, but some dogs would not stop.
In 1942, one use of the anti-tank dogs went seriously awry when a large contingent ran amok, endangering everyone in the battle and forcing the retreat of an entire Soviet division. Soon afterward the anti-tank dogs were withdrawn from service. Training of anti-tank dogs continued until at least June 1996.
(I saw it on oddee.com)
"Most sorts of diversion in men, children, and other animals, are in imitation of fighting." - Jonathan Swift