
*wince* You do realize just
how bad IJA generals were?

Well, historically Jackson made major tactical errors in every single battle he fought, including Fredericksburg where his troops were the only Confederate forces to take any serious casualties at all, and this was because he never bothered to fix a hole in his lines he knew was there. Meade put a fright in him. Jackson also turned over his entire list of subordinates on a regular basis, and JEB Stuart was the one who actually managed to secure the victory at Chancellorsville on the second day of this attack, Jackson's attack on the first suffered from his usual secretiveness and inability to handle large numbers of troops
Yeah, considering they thought a bright idea for infantry to frontally assault entrenched troops with heavy machine guns backed up by lots of artillery and air support!

Well, historically Jackson's first major engagement he lost, the Valley Campaign saw him brilliantly carry out Robert E. Lee's idea, the Seven Days saw him having a repeated string of epic failure and inability to get into fights at all, at Cedar Mountain the same Nathaniel Banks Richard Taylor routed at the height of Union strength nearly routed Jackson, during the Second Battle of Bull Run his tactical handling was mediocre and it was Pope's piecemeal commitment of his troops that permitted him to barely stave off disaster, not Jackson's own actions so much (it still counts, though), at Antietam Jackson's line was actually broken by the Union assault on his sector of the line, at Fredericksburg he left a hole in his line and never bothered to fix it, and at Chancellorsville was unable to control his entire attacking force and to ensure a joint, mass assault as opposed to a piecemeal one.
Jackson was like Sherman: brilliant strategist, lousy tactician.