Hi!
Certainly, the first battle seems a little lopsided. But bear in mind one very important thing that can help to understand (or at least explain) some of this results:
- On the battle report, you will see all the elemnent both sides have present on the region... but it did not mean all of them participated on the battles.
This is a little confusing, but it seems to be a limitation of the battle report system
I could be the case that some units are in a stack inside the a city and don't participate on a battle outside the structure. Even several stacks outside a structure can not support each other because of delayed battle comitement, as the regions are very large.
This is one of the dangers of having several stacks. You can't be sure every one will be engaged in battle or at least be engaged at the same time. Its possible that they are defeated in turn, instead of fight at the same turn.
You can check this by seeing the casualties after battle. If you have several stacks its probable some of them suffer all the losses and some none (as they have not been committed).
The second screen result has an easy explanation: there are nearly no real combat units on the union stack. They are all support units except the guns, and the naval gusn are "fixed guns" and only fire to the sea.
So the only opposition is the siege guns, not much against a full CSA corps.
The "problem" in this case is not the casualties. Its that a stack of supports units tried to attack your powerful corps...
Regards!