I do wonder how usefull using Bio Weapons might have been if the Allies retaliate with Chemical and or Bio Weapons against the remaining German held territory ?Since the POD is September 1st then have the 15 army retreat northward and blow up everything usefull in Antwerp harbor.
Then remove all food from the Neatherlands and evacuate the country completly and have the allies deal with supplying both the Dutch and their own armies
Evacuate everything from Norway and send those forces to the Eastern front.
Since the Warsaw uprising is ongoing, retreat from Warsaw and let the Russians deal with the Polish home army. The soviet union disliked the Poles as much as the Germans
Remove the troops from the Courland pocket. Sure the Soviets get to use the forces they had there also, but there is just so much space they can move
Use every biological weapon avalible against both the eastern and western allies
Destroy everything usefull in Italy, take all food and withdraw to the Alps. Then the allies have to feed the Italians in the Po valley as well as their own troops
Withdraw from Yugoslavia completly instead of making a stand and destroying everything usefull and taking all food as above
Is this enough to make Germany survive another year?
I suspect once the Americans have nuclear Weapons the Nazis will be defeated fairly quickly.