John, an impression should have the lingo down somewhat, and slang terms like Rip Raps, and other words. But if you read the diaries and journals, you will discover how these people talked and the words they use. In a number of Yankee Diaries and letters home they give descriptions of how some contraband got too close to camp and they josted them around a bit, sometimes breaking bones. Not racist much... And I am talking about Northern Units. South had its share, no one comes out clean on that. But you do have the Blacks in Southern Units, in First Texas a man signed up in Houston giving his place of birth as Shanghai China. The Mexicans in Texas units were not limited to just a few. Mexicans also were in the Federal's ranks, those enlisted at Brownsville in the late stages of the war. Let's not forget the Indians (no slander intended since I am part native) who also fought on both sides. The guy who wrote the surrender terms between Grant and Lee was a native.
But there have been a few who have said the North was against slavery but wanted the Black man gone. Orgen when it came into the Union during the war submitted a Constitution for Congressional approval and they would not allow anyone to sell land to a Black. That changed in 1920 but Oregon remains about 83% white. Learn that mankind isn't always good, and isn't always what they preach, and realize that if you want someone to fight for a cause, you have to paint a picture that isn't always nice about the other side. Oh, they are all racist in the South, and stupid, and they all married their sister. By the place of my birth, and the way I talk (Texas) I am dumb, stupid, red-neck, and married to a sister that was never in my family, and we fought for our "rits." So go JINE the Calavry and gona have a good time, good time. Don't take it so seriously. I have not found many who do. In many re-enactments the people don't get near enough to see if you have an Enfield, Springfield, Harpers Ferry but that you carry something that looks like a gun.