The Testing Ground is a key location in Isaac Asimov's short story The Weapon Too Dreadful to Use.
Description[]
The Testing Ground is a remote, secure military facility designed for evaluating new weapons technology. It is described as an open, cleared area equipped with military hardware for target practice. It is here that Professor Mayberry sets up his generator to project the Negation Field. The location provides the necessary space and safety to test the field against various ordnance, from rifles to large artillery pieces, without risk to populated areas.
It is at this specific location that the theoretical invention becomes a practical reality, and where General Weider witnesses its power and deduces its world-ending implications.