The United States boasts, without a doubt, the largest construction capability of the major powers by 1936. A 'great neutral nation' will be drawn into a great whirlpool, whether it is hoped or not.
The US policy of non-interference with foreign wars has been established, but tensions are increasing in Europe and Asia. This has come to a dramatic end as the nation is in trouble due to the Great Depression. The United States returned to isolation from the end of World War I and enjoyed economic prosperity in the Roaring Twenties.