I have two separate army corps in a sector; how do I merge them? For ports (and I assume air bases) there is a merge option. But I don't see how to do it for ground units. 
And speaking of that merge for fleets, how do I select what gets merged? Right now it picks for me and inevitably totally messes up what I want to do.
Thanks!
And speaking of that merge for fleets, how do I select what gets merged? Right now it picks for me and inevitably totally messes up what I want to do.
Thanks!