Answer:
1930s
Explanation:
During the decade of the 1930s, the US had the foreign policy of Isolationism. This policy was a reflection of a series of issues, such as the Great Depression and the aftermath of World War I, with a high number of casualties turned the public’s opinion against the US intervention in foreign conflicts.
The rumor that bankers and arms manufacturers wanted to profit with war spread around the population, which influenced the government to maintain such a policy.
With the Great Depression, the US had to increase their attention to domestic problems, this helped the idea of isolationism.
