Paleolithic or old stone age from the first production of stone artifacts
Although there are numerous factors that can affect a counties GDP, especially today when the entire world is so "connected", a major reason why GDP fluctuates so much in this part of the world is that these economies rely primary on agriculture, which can be profitable one year and then not profitable the next, due to weather changes.
Returning over 4,000,000 soldiers to the workforce and filling the void left by the cancellation of wartime manufacturing contracts
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Explanation:
The world war ended and there was an economic fading down because the country was involved in war time production and they have to transfer their focus to civilian and domestic production which was a major challenge. Production lines were ramped down and that led to the return of the crores of soldiers to stay unemployed for a while.
American economy was also in the verge of falling in recession due to the economic slowdown. American exports also dropped down sharply due to the war. Consumerism during the roaring twenties boosted the economy slowly and there was a gradual increase in the economic stability achieved by united states after the world war I.
Answer:

A member of powerful, all women organization channelers (magic users) called Aes sedai...