It was the period of Catholic resurgence initiated by in response to the Protestant Reformation.
The controversial work of the National Recovery Administration.
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Answer:
It could be argued that "we were strongly committed to staying out of the war, in other words, neutrality." This was foreign policy for about half the decade.
Zimmermann telegram- Nothing like negotiating with a neighbor to invade their front lawn.
Unrestricted submarine warfare- Sinking ships owned by the US constantly is already making us angry.
and the sinking of the Lusitania- Now this wasn't the final straw but it did indeed shake US support for Germany and caused outrage all over the USA.