Here's a save game.
https://mega.co.nz/#!aI82ybIY!O_S-hanQq9jzhLfpv9NebSOViBbiA-PAOIJXkac1aqs
While I'm here, let me point out that the attachment manager wouldn't let me upload a file because it is too big by 3.56 MB. The file size is 3.9 MB.
Here are the steps to reproduce the crash with this save
1. End the current war (it's at 100% already, so just enforce demands).
2. Dismiss all armies
3. Select Cornwall county and go to the diplomacy menu
4. Select declare war and press the claim of Eadwig Oswinesson.
5. Raise your personal levies
6. Raise your vassals' levies
7. Crash
As for the unit packs:
African
Byzantine
Russian
Other DLCs:
African Portraits
Charlemagne
Dynasty Coat of Arms 1 and 2
Legacy of Rome
Mediterranean Portraits
Mongol Face Pack
Russian Portraits
A bunch of Songs
Sunset Invasion
The Republic
The Sword of Islam
I had another save but I must have deleted it because it seems that I don't have it anymore.