Rise and Decline of the Third Reich is a classic "grand strategy" wargame covering the European theater of WWII. The game is huge in scope. Players take on the roles of all of the major national powers and can simulate the entire war effort from 1939 until the end (often isn't until 1946). This game is a favorite of many because of an excellent balance between politics and military might, and it gives players a chance to try things that did not happen historically to see if they might have worked better (e.g., Germany invading Spain). There are many factors for players to deal with: resources, unit production, negotiation, and, of course, strategic warfare.
These sessions will be using the 4th Edition Rules as updated on Boardgame Geek
3r4_5th_v4.pdf