I thought the series on the Civil War (the war of northern aggression) was very interesting and filled in a lot of time line information for me. Yes, it was presented somewhat from the northern yankee's point of view. But over all I enjoyed the series.
The series about Baseball was very disappointing and should have been called History of Blacks in Baseball.
I agree the Vietnam series was sometimes skewed towards the anti-war leftist, especially in the later episodes. Which, accurately reflected the changing mood of the country. (upon discharge, for safety, we were told not to wear our uniform if using public transportation going home)
Vietnam war was extremely complicated on every level, and no matter how it's presented. People are going to be rubbed the way.
Overall I think the series did a good job trying to help the younger generation understand the war.