You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
alternatehistory.com
In Hearts of Iron IV, there is an achievement called "30 Minutes of Hel", which requires you to start in the 1939 scenario as Poland and inflict over 1.8 million casualties on Germany.
This AHC is inspired by this achievement. With a PoD of any point after August 1, 1939, you need to have Poland inflict as many casualties on Germany as possible.
Bonus points if:
You inflict over 1.8 million casulties on Germany, just like in the achievement.
You inflict a similar casualty rate on the Soviet Union.
For reference, in the actual campaign around 16,300 German men were killed and another 3,500 went missing.