There are a couple of good current programs which simulates the...

There are a couple of good current programs which simulates the campaign - some at the General/Field Marshal level and some which allow you to be Adolf. Hearts of Iron and Grigsby's War in the East are the most complete whilst Unity of Command provides a quick game on the key battles with a focus on Supply -

This is much better side discussion than the slanging match going on by SDE and XIN..- to my mind June 7 is not too far away -

All DYOR and IMO of course.