Blocks are as usual, but the labels are different colors.
No errata was included, but I found a conflict between the rules and the charts within a minute of looking at the components. I can't imagine the chart is correct on that one. River movement and such is the biggest addition. The Union dominated the rivers, and so they are the only ones who can make river moves and invasions. Invading units can also retreat by river, at the cost of double pursuit fire.