This is a historical question, and not meant in any other way...
Why were/are the brits called Tommy's and the germans called Jerry's ?
Tom is Grey, and Jerry is brown.
The German Army wore grey uniforms, the british brown.
Jerry, was the smart one, and always won, where as Tom was a real dunce.
Where did it all come from, and has it got anything to do with "Tom & Jerry" at all ??