Well, now that I have perked your interest. Here is more information. When you go up a level, your stats change by the following values.
Odd level (or odd stars) - +1 Offensive fire, + 1 Evade, +1 Police, +1 Assault
Even level (or even starts) - +1 Defensive fire, +1 Initiative, +1 Discipline, +1 Patrol
At 5th level (or starts) + 1 to Rate of fire. You will see from the below shots what I mean.
Infantry and Elite Infantry
Artillery (only 2 types - Columbiad and 12lbers)
This even applies to ships! I have attached ironclads to let you see what they can do as well (although the data is not as good).
And last, but not least, the orginal file for your viewing pleasure.
Remember - The beatings will continue until morale improves.