My biggest hardest pipedream!

[Sir John Cope]

A hereditary game! Begin at age 25, pass it on to your heir sometime in 1942, then his heir can play 1943, and your great-grandson might just be able to finish the war!

Funny! But it's not that impossible. France 1914 (F 14) German side, has about 35% of Barbarossa; or seven armies of c. 1,200,000 men and 5,000 guns. Once you get into it, you can make a German move in 2-3 hours. Barbarossa would be a lot more complicated but, and you have to be into it and your opponent as well, and commit to keep the game moving: but maybe a week to make a move, or 6 full moves per month; considering that you have to have a real life as well (some of us don't I suspect). So let's say 50-100 turns a year (minimum) or 7-10 days (June 22-to July 1); so a ten year commitment would maybe get you to September/October?
jonny

True, I was joking -  but you're right that, as monster games go, this one would certainly be a very big monster, but not Godzilla.