There are several big countries in the world.

There are five countries in the world:

1. The United States ranks first in the world in military science and technology, military thinking and military expenditure, and is a leader in the transformation of world military theory. Now its military strength is developing into outer space, and zero casualties are approaching.

2. Superpower Russia inherited 70% of the military strength of the Soviet Union, with a solid foundation of heavy industry, advanced military science and technology, and strong ability to independently develop weapons.

3. China has a perfect military industry system, and its electronic technology is slightly inferior to that of the West. While tracking the world's advanced technology, military science and technology are constantly improving and innovating. It has a strong ability to independently develop and absorb weapons, and its space technology and missile technology are ahead of Europe.

4. France has a very advanced and perfect military industrial system, developed electronic technology, and the ability to independently develop weapons is the strongest in Europe. Its military equipment does not depend on other countries, but it can develop many high-tech weapons comparable to those of the United States.

Britain's current strength can't replace the United States, but with its solid industrial base, developed military technology and economically powerful electronic technology, and the support of the United States, it is enough to maintain Britain's position as a world power.