I have the same problem, sent my mini-dumps to Ironclad and they had suggested the following:
Hi Daimean,
Please excuse the delay in this reply, we have been unusually busy with the beta 2.5 patch this past week. Your minidump file suggests that you are running out of addressable virtual memory. If you have not done so already, please update to the beta 2.5 patch for Entrenchment; it includes a number of memory optimizations that should eliminate this particular type of crash problem in nearly all circumstances.
Stephen
Technical Support
Ironclad Games
I advised them that the patch had been the cause of this.