What originally limited the effectiveness of the united states

The effectiveness of the United States:

The United States Nation is more successful in forestalling wars than numerous specialists might suspect. The United Nations was established in 1945 so as to forestall struggle and to keep up world harmony. The U.N. has a large group of different activities. It attempts to assist nations with diminishing appetite, sickness, and lack of education. It advances supportable improvement and the earth.  

the correct answer is political prisoners

“the battle of stalingrad is not a turning point necessarily in strategic terms, because a lot more has to be done before the soviets can be certain of defeating germany,” says renowned world war ii historian richard overy. the germans had fought nearly a thousand miles across the soviet union to get to stalingrad.