how did the war in europe improve the american economy
When the war began, the U.S. economy was in recession. But a 44-month economic boom ensued from 1914 to 1918, first as Europeans began purchasing U.S. goods for the war and later as the United States itself joined the battle.
Overall, American aircraft production was the single largest sector of the war economy, costing $45 billion (almost a quarter of the $183 billion spent on war production), employing a staggering two million workers, and, most importantly, producing over 125,000 aircraft, which Table 6 describe in more detail.