How did american make money fron the war in europe

Explanation:

Although the United States was actively involved in World War I for only nineteen months, from April 1917 to November 1918, the mobilization of the economy was extraordinary. (See the chronology at the end for key dates). Over four million Americans served in the armed forces, and the U.S. economy turned out a vast supply of raw materials and munitions. The war in Europe, of course, began long before the United States entered. On June 28, 1914 in Sarajevo Gavrilo Princip, a young Serbian revolutionary, shot and killed Austrian Archduke Franz Ferdinand and his wife Sophie. A few months later the great powers of Europe were at war.

Many Europeans entered the war thinking that victory would come easily. Few had the understanding shown by a 26 year-old conservative Member of Parliament, Winston Churchill, in 1901. “I have frequently been astonished to hear with what composure and how glibly Members, and even Ministers, talk of a European War.” He went on to point out that in the past European wars had been fought by small professional armies, but in the future huge populations would be involved, and he predicted that a European war would end “in the ruin of the vanquished and the scarcely less fatal commercial dislocation and exhaustion of the conquerors.”[1]

its perfect how it was

necessary and proper clause. the congress shall have power to all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states, or in any department or officer thereof.