Stubby was a little stray bull terrier found by J. Robert Conroy and smuggled into the 102nd Infantry during WWI. Sgt. Stubby was originally intended to just be a mascot (he could do a little salute!), but soon proved far more useful. After suffering a mustard gas attack, Stubby became ultra-sensitive to its odor and was able to run through the trenches, barking and biting soldiers awake before an attack. The dog could locate wounded Americans on the battlefield by listening for the specific sounds of English amid the fracas. He’d stay and bark until the medics came, or lead the soldiers back to the trench.
Once, when a new soldier in the trench called to him, Stubby’s ears went flat and he charged. The man ran, and Stubby bit him on the leg, causing him to fall. Stubby kept attacking until soldiers came. The man he bit had been a German spy who was mapping out the trenches. Eventually, Stubby was injured and unable to return to the front line. He spent the rest of the war on duty in the hospital, improving the morale of the wounded men. By the end of WWI he’d been in 17 battles. Sgt. Stubby lived out the rest of his life comfortably with his master, Conroy.