It can be understood this way: Germany compared with the Allies is like jet aircraft compared with propeller aircraft.
Although Germany's economy and production capabilities are far from those of the Allies. However, Germany has carried out a series of innovations and reforms in military weapons and combat thinking. At that moment, the German army had almost the most advanced combat ideas and weapons in the world, and applied the most cutting-edge science and technology to warfare. The individual combat capability is naturally the strongest (followed by the United States, the Soviet Union, Japan and the United Kingdom).
To this day, some of the German combat theories are still adopted by the armies of major countries in the world, and are even studied as basic combat theories. (Assault rifles, air-to-air missiles, air-to-surface missiles, assault artillery, and blitzkrieg were once all German "patents")