An IMPORTANT FILE FIX to the export_descr_buildings.txt was uploaded in the other thread yesterday. I don't know if it was a problem with the campaign sub mod itself or if it was something I added incorrectly, but it will cause some CTDs when playing as the Uesugi (and perhaps fighting them on the battlemap). If you want to manually check, use -show_err and fix the typos by adding "s" to "romans_scipii". It is currently and incorrectly written "roman_scipii".
Otherwise, upload this file and place it in your Data folder. Note that this file only works with my other campaign fixes, so if you just want the campaign mod without my changes, you need to use the -show_error command line to ensure your file is working correctly. I suggest everyone uses this anyways when you play any mod.
One other known problem with the campaign submod is some custom battle maps are not working correctly (I am not sure which ones, but its several but not all of them. Grassy_plains map seems to always work fine). This glitch will cause all forces put on the custom battle map to immediately drown at the start of the battle. I'll spend some time looking up the cause tonight, as it is a bug that leaves no show_err message.