I play as the Union side and by the end of 1863 I've run out of compatible corps and army commanders. Some leaders promoted by event and only 4 or 5 generals could be promoted "manually", eg. Sheridan, Grant, Canby and Kearny.
I've fought many battles and leaders gained or lost some seniority ("blamed for heavy losses"). Some guys did their job well (eg.Pope, Wood), but they couldn't be promotable. Why? How the system work? What is the connection between the senirority and the promotion? (Is it easy to mod?

IRL Grant won some battles and became an army commander, McClellan won some minor battles and he became army leader too. Burnside and Meade are good examples too.
My opinion is a good solution would be high boost of seniority for winning battles and reach the promotable status in 3 or 5 victories....
Please help to understand the system and sorry for if I asked silly thinks.
Best regards,
H.