PBS is running a great six hour series on the first world war. I hadnt realized how short it was for the US- barely a year of active fighting. It was impressive how the US manufacting economy could turn on a dime to support the war. Another takeaway was integration of European immigration groups- Italians, Irish, Polish had to work together and learn mainstream American ways. Alas, Blacks were still disrespected and would have to wait a few more wars for full military integration.