Answer:
The last straw was the restart of the unrestricted submarine warfare by Germany and the interception of the "Zimmerman Telegram". The telegram reveals a plot by Germany to help Mexico regain Texas, New Mexico, and Arizona if it attacked the United States.
When the United States went to war in April 1917, the United States Army had just 130,000 soldiers, had no tanks, and had few planes. Congress quickly requires mandatory recruitment to swell its forces. A German admiral identified that few changes the American fighters arriving in Europe due to the submarines that blocked their passage.
However they succeeded. "Lafayette, here we are," said a colonel at the Paris grave of the French nobleman who aided in the United States' war of independence.
It is a war that causes between 40 and 50 million deaths worldwide and especially in Europe, that is, four times more than the First World War; the USSR pays the highest price with a loss of 10% of its population.
On the ground, Europe is the most affected and has already been the theater and victims of the First World War.
The territory, civilian population, and infrastructure of the United States were unaffected, but there were still 12 million US soldiers and Marines involved in the war. This is a significant figure for a population of 132 million, or 12% of the population, including 100,000 women.
There are 405,000 Americans dead and 670,000 wounded. It is not the deadliest war for the United States, the deadliest is the Civil War of 1861 - 1865 that killed 620,000 people.
Step-by-step explanation:
Economically, the United States and Texas experienced a spectacular boom in part due to the enormous amount of energy the Americans put into production during the war.
It is a much stronger boom than in the 1920s and much stronger than the New Deal allowed. It is with the war that the unemployment curve falls, from 1938 to 1939 there is a decrease in unemployment.
This restart will mainly benefit the largest and wealthiest, as was the case with New Deal policy. It is a boom that favors the arms industry. It is also a boom that will accelerate the transformations in American society that had already begun since the 1920s.
This economic boom is accompanied by huge internal migrations. In the 1920s, of 132 million Americans, or 15% of the population, moved internally to meet economic needs. This heavy migration is of great benefit to California and it is notably through California that all the soldiers who are sent to the Asia-Pacific region pass.
It is important to see this context of economic recovery and large migrations ... 19 states, especially central and rural states, are losing half of their inhabitants, the federal state declares the Selective Service Law that exempts agricultural workers from military service .