Hi all! I have recently downloaded the PC series and really enjoying it so far (brings back so many great memories from Panzer General II

). I was wondering if there was any difference between the "Grand Campaigns" and what I refer to as "regular" ones. For instance, on the basic Panzer Corps section, I can select 1939 - Early Blitzkrieg (which reads 1939-1945 in the picture and indicates it starts with the invasion of Poland) or I can go the "classified" folder and choose Grand Campaign '39 (Polish invasion, etc.).
So what is the difference?
Can both end up invading the US/UK ect? I seem to recall doing that in one of the campaigns in PG II.
Thanks in advance!