Answer:
"The United States wanted to help revive the economy in both places."
The United States took part in the World War I, that took place from 1914 to 1918. In very simple words, the war was caused by heavily inflated militarism, nationalism and imperialism.
However, after the war ended, the US wanted all of the world, specially those places that participated in the war, to be reestablished, and have their economy back in order
Hope this helps, friend!