The Rottweiler is, and always has been, a true working dog in every sense of the word. In looking at a modern member of the breed, it is not difficult to envision the similarity between him and the bristle-coated, mastiff-type drover dog, one of several types found in the early Roman Empire and believed to have been progenitors. His substance and power denote strength. His massive head, with its broad skull and strong jaws, is a symbol of intelligence and capability.  His medium-large size, everything compact and in perfect balance, free of exaggeration, and his general attitude of fearlessness indicate that he is a dog not only willing but able to accomplish whatever may be required of him.  He is indeed a handsome, useful dog that has come down through the ages, unspoiled by the whims of man.

Our history books tell us that the ancient Roman army conducted a highly successful invasion of southern Germany around 74 A.D.  Dogs that excelled in drover and guard work were essential for the troops of those days.  They served the twofold purpose of guarding prisoners and keeping the cattle (which were brought for food) in line.  Who actually can even start to evaluate the importance of the role played by these dogs when one considers that the lifeline of food for the troops depended on their efficiency.

Reference:    Rottweilers by Anna Katherine Nicholas    #1 Best Selling Rottweiler Book