Depends on how well (or poorly) you handle it. Immigrant-heavy America fought extremely well together against WWII Germany - even though a great many of the Am

Depends on how well (or poorly) you handle it. Immigrant-heavy America fought extremely well together against WWII Germany - even though a great many of the Americans fighting, and their military leaders, were of fairly-recent German or near-German decent. (Actually, quite a few had themselves been born in Germany.) Vs. the uber-secret Manhattan Project had 4+ Soviet spies inside its "Top Secret" tent right from the start - all for ideological reasons.