What would the effects be of less European immigration to the Americas in the years between 1855-75. Don't worry about how or why, just concentrate on the effects (I'm trying to work out the ripples of my Three Thrones timeline).
Red said:@Justin
I think you would have to give them an idea of how many you take away and from where in Europe they should have came.
Here is an excellent statistic of how many from where that came to USA from 1820 until present