D . Article I Section 8 in the Constitution gives them the power to do so
A dispute between President Harry S. Truman and GeneralDouglas MacArthur in 1951, during the Korean War. MacArthur, who commanded the troops of the United Nations, wanted to use American air power to attack the People's Republic of China.
The main reason why the United States was able to assert itself on the World Stage after WWII was because the US emerged from the war with an incredibly high GDP, thanks mostly to war-time spending. This allowed the US to act as a world leader because so much else of the world had been crippled economically.
<span>The Thirty Years" war was a war between the Catholics and the Protestants from 1618 to 1648 and included the countries France, Sweden, Spain, and Denmark.</span>
