The United States has the most powerful army in the whole, and its military expenditure ranks first in the world, accounting for about 43% of the total military expenditure in the world; The land area is 9 1.59 million, which is quite rich on the whole, with many overseas territories and huge strategic space; The population is 3150,000, the university popularization rate is 77%, and there are 4/kloc-0 scientists and engineers per 10,000 people, so the population quality is quite high. The per capita GDP is 49,922 US dollars, and the total amount is1568.475 billion US dollars (20 12), ranking first in the world. In American industry, manufacturing accounts for three quarters of the country's total output. As far as industrial basic metal steel is concerned, the United States accounts for one-fifth of the world's output and has great potential for war.