First accounts of the Boxer dog as we know it now can be traced back to Germany. Used as a hunting dog, it was ideal for for holding down injured bull, bears or boar like animals down until their master would arrive a the seen. It's undershot bit would make sure that it didn't tear the animal from piece to piece. The dog was also used because of its courage, not shying away from taking on the biggest of animals when it came to it.

Somehow in the late 1800 the boxer dog found itself in the circuses because of it's ability to learn quickly and being easy to train. Whilst travelling around with these international circuses it was bred with the more taller English variant of the dog and thus begun the modern boxer dog.

Then for some reason after the first world war, many American Soldiers and service men tog the dog back to the states with them and begun to start a new breed over on that side of the pond.

The current boxer dog is is a descendant of all these variants and now has a enough of a wide gene spread that it isn't particularly badly affected by the inbreeding diseases and problems that other breeds suffer from.