Changing tack, IMHO there are very few circumstances in which I would want to put army baggage in a command with a general. If that command breaks, the knock-on effects to the rest of the army would be dramatic, given that the baggage would then all count as lost! Each other command would lose the ME effect of the baggage as well as the temporary +2 for the broken command. Game over in 99 out of 100 cases, I'd think!
Tim Child
Oh there are quite a few, playing against that tricky fellow Richard A. mostly makes you try and come up with off the wall solutions.
If you wish to have more chance of weather or wind changes then taking an extra train command does not make sense. Even though you must roll at least 4 dice ( until the dummy rolls a 6 ), there is still more chance of weather change than rolling with the extra dice.
Placing the Army baggage in a Sub command increases the element numbers ( some times dramatically ), this can put it on an advantage when flank marching ( but it is a double edged weapon as it could be just as easy lost ). For example in say a Galatian army having a command of 1 General and 34 warband(O) is 35 elements, add to that 6 elements of baggage that gives the total element count for the flank march at 41, which is quite a good size flank march ( and it may even be an option for sub Brit's ( only those with sub generals )).
If the Army baggage contains the Carroccio then it would be easier ( less pips ) to move it in a generalled command rather than a train command, this way it might be able to follow all those poor Italian ( or Anglo Norman ) Sp(I) who could some times use it's support.
Trying to hide the Baggage can be a little hard in a 4 generals Army, Concealed command C in C, delay another command and 2 flank marches will leave a Train command all alone on table ( and that is scary enough to look at ), if the Army baggage was in a command even that would not have to be iniatially deployed, giving more options for putting no troops on table.
There may be many more reasons to consider Army baggage within a command but of course none of them would out weigh an extra dice for a regular Train command, sometimes (as with Burgundian Ord. ) it is ( at the moment ) possible to have a regular Train command but only if it does not include Baggage, placing Army baggage in a generalled command for this army nearly gives the same ME benefit but across all generalled commands plus having an extra regular dice.
Some to be going on with.

William