The German Shepherd Dog (German: Deutscher Schäferhund), also known as an Alsatian or just the German Shepherd, is a breed of large-sized dog that originated in Germany.
The German Shepherd is a relatively new breed of dog, with its origin dating to 1899. As part of the Herding Group, the German Shepherd is a working dog developed originally for herding and guarding sheep. Because of its strength, intelligence and abilities in obedience training it is often employed in police and military roles around the world.
Due to its loyal and protective nature, the German Shepherd is one of the most registered of breeds.
For more infromation see http://en.wikipedia.org/wiki/German_Shepherd_Dog.