In 1917 Conrad, an important AustroHungarian general, advocated an Eastern Strategy. Instead of knocking France out of the war before the Americans got there, he suggested taking out the new Russian government. What if he got his way?
The Germans build successive defence lines back to the Rhine and send a third of their divisions to Russia and drive essentially all the way to the Urals in 1918. Siberia is still Bolshevik, but that's about it. Baku is in German hands and so is the entire Black Sea. Bulgarian troops are relieved at the Salonika front and Bulgaria stays in the war. German aircraft are sent down to Turkey and the Palestine front, so Turkey is also successfull and stays in the war.
With a defensive strategy in the West the war is less successful for the Americans.
Meanwhile the war lasts until 1919. The Flu shuts down offensive operations in the winter on both sides.
Germany does five things.
1. It demobilizes the AustroHungarian army except for volunteers. The harvest is much better in 1918 (and 1919) than in OTL. So is the coal supply.
2. It captures great quantities of horses from the Russians. These are crucial in keeping the war going. There was an epizootic horse encephalitis or something back then which was like an OPEC embargo in the effect it had on the economy.
3. It sends all the Easternfront prisoners back home and frees up lots of guards for the trench lines and other purposes.
4. It sends all the submarines no longer usefull in attacking ships (because the British adopted convoys) into the Mediterranean and starves the Salonika front of supplies.
5. It sends the Easternfront troops to the Westernfront when they are no longer needed in Russia. The second line troops are sufficient to keep the peace in Russia.
The Allies do five things.
1. America has twice as many troops in Europe in 1919 as in 1918. Britain and France bring in huge numbers of colonial troops, using their previous colonial troops as a cadre.
2. America has ramped up it's munitions production in 1918 and 1919, more ammunition, more armor, more aircraft, more artillary.
3. America has a trained army. They have discovered which doctrines work and know how to use them in different situations in combined arms operations. They tested them in 1918 in OTL. Now they have perfected them.
4. America has a new president. In OTL Wilson had a stroke. In this ATL he is overseas and can't be isolated as in OTL. Marshall is now president pending Wilson's recovery.
5. America has a new strategy. America is going to move it's air bases into range of the German cities and bomb them into submission.
The results are that the Germans are attacked by artillary to pin down the edges of the battlefields, aircraft to straff the trench lines, armor to breach the barbed wire, and small groups of infantry continuously infiltrating the trench lines.
Germany is pushed back to the Rhine in a month's worth of battles. A million troops die on each side. German troops are experienced, but armor, aircraft, and artillary is a winning combination. Germany now has lost as much territory as they took from France, and suffered as much damage. And it isn't over.
The American bombers arrive in the fall of 1919. No decent antiaircraft fire, no decent radar, and radio controlled direction finding let the American airforce find the German cities across the Rhine. They can't bomb anything smaller than a square mile or more than a hundred miles from the radio stations they use for direction finding, but there are lots of German cities larger than a square mile within a hundred miles of the Rhine. They take off at night from the airfields, the radio is turned on so they can find their way to the target, they bomb at night so they can't be shot down, and then they fly back to their airfields and land in the daylight, where a CAP deals with any Germans that have followed them home.
This goes on all winter.
In 1920 the Germans surrender on terms.
1. They lose all territory west of the Rhine.
2. They lose all territory in the east where they are not a majority.
3. They lose all their colonies.
4. They lose their navy.
5. They are allowed to keep an army.
6. They do not pay reparations because the damage is so great to the German cities that the French are no longer at an economic disadvantage. Having 10,000 American bombers operating a conveyer belt to your cities is very, very, destructive. A 100 pound bomb will destroy a house worth 100 times as much. Also, there are a lot of dead civilians as they desperately try to keep their economy going and not evacuate their industrial heartland.
So, what do the Americans (and their European allies) do with Eastern Europe and Russia and the 'stans?
The Germans build successive defence lines back to the Rhine and send a third of their divisions to Russia and drive essentially all the way to the Urals in 1918. Siberia is still Bolshevik, but that's about it. Baku is in German hands and so is the entire Black Sea. Bulgarian troops are relieved at the Salonika front and Bulgaria stays in the war. German aircraft are sent down to Turkey and the Palestine front, so Turkey is also successfull and stays in the war.
With a defensive strategy in the West the war is less successful for the Americans.
Meanwhile the war lasts until 1919. The Flu shuts down offensive operations in the winter on both sides.
Germany does five things.
1. It demobilizes the AustroHungarian army except for volunteers. The harvest is much better in 1918 (and 1919) than in OTL. So is the coal supply.
2. It captures great quantities of horses from the Russians. These are crucial in keeping the war going. There was an epizootic horse encephalitis or something back then which was like an OPEC embargo in the effect it had on the economy.
3. It sends all the Easternfront prisoners back home and frees up lots of guards for the trench lines and other purposes.
4. It sends all the submarines no longer usefull in attacking ships (because the British adopted convoys) into the Mediterranean and starves the Salonika front of supplies.
5. It sends the Easternfront troops to the Westernfront when they are no longer needed in Russia. The second line troops are sufficient to keep the peace in Russia.
The Allies do five things.
1. America has twice as many troops in Europe in 1919 as in 1918. Britain and France bring in huge numbers of colonial troops, using their previous colonial troops as a cadre.
2. America has ramped up it's munitions production in 1918 and 1919, more ammunition, more armor, more aircraft, more artillary.
3. America has a trained army. They have discovered which doctrines work and know how to use them in different situations in combined arms operations. They tested them in 1918 in OTL. Now they have perfected them.
4. America has a new president. In OTL Wilson had a stroke. In this ATL he is overseas and can't be isolated as in OTL. Marshall is now president pending Wilson's recovery.
5. America has a new strategy. America is going to move it's air bases into range of the German cities and bomb them into submission.
The results are that the Germans are attacked by artillary to pin down the edges of the battlefields, aircraft to straff the trench lines, armor to breach the barbed wire, and small groups of infantry continuously infiltrating the trench lines.
Germany is pushed back to the Rhine in a month's worth of battles. A million troops die on each side. German troops are experienced, but armor, aircraft, and artillary is a winning combination. Germany now has lost as much territory as they took from France, and suffered as much damage. And it isn't over.
The American bombers arrive in the fall of 1919. No decent antiaircraft fire, no decent radar, and radio controlled direction finding let the American airforce find the German cities across the Rhine. They can't bomb anything smaller than a square mile or more than a hundred miles from the radio stations they use for direction finding, but there are lots of German cities larger than a square mile within a hundred miles of the Rhine. They take off at night from the airfields, the radio is turned on so they can find their way to the target, they bomb at night so they can't be shot down, and then they fly back to their airfields and land in the daylight, where a CAP deals with any Germans that have followed them home.
This goes on all winter.
In 1920 the Germans surrender on terms.
1. They lose all territory west of the Rhine.
2. They lose all territory in the east where they are not a majority.
3. They lose all their colonies.
4. They lose their navy.
5. They are allowed to keep an army.
6. They do not pay reparations because the damage is so great to the German cities that the French are no longer at an economic disadvantage. Having 10,000 American bombers operating a conveyer belt to your cities is very, very, destructive. A 100 pound bomb will destroy a house worth 100 times as much. Also, there are a lot of dead civilians as they desperately try to keep their economy going and not evacuate their industrial heartland.
So, what do the Americans (and their European allies) do with Eastern Europe and Russia and the 'stans?