He hoped it would give the US an advantage over the Soviet Union since it was much more powerful than an atomic bomb.
If, the war described in the question is referred to second war then:
This war was considered as the greatest war configuration in the history in the humanity unleashed by nazi Germany, fascist Italy and militaristic japan.
At the early years of the war the ally countries were France, england and soviet Union.
The largest losses corresponded to the Soviet Union wich lost 27 million people.
Here is a list of the correct statements:
1) Ended the war between the United States and Mexico- The Treaty of Guadalupe Hidalgo ended the Mexican-American War in 1848.
2) Ceded territories from Mexico to the United States- This is also known as the Mexican Cession. The US gained territories that would later become states, such as California, Arizona, New Mexico, Utah, and Colorado.
3) Called for the US to pay Mexico $15 for lands in the Mexican Cession.
