By March 1918 the Germans had largely achieved their war aims in which they pushed having this war. The growing power of Russia had been curbed and controllable buffer states had been setup in the east as buffers against a Russian revival and as economic explotation zones much better than any German colonies pre war.
The 1918 offensives seem risky, only a slight temporary superiority of manpower can be achieved and even if the best hoped for results are achived, the complete roll up of the Somme and the destruction of the British armies there, there is no guarantee that ends the war and the Allies backed by a fresh America, just don't continue to build up strength, and enforce the blockade.
So what if the Germans just do nothing, no offensives anywhere (except to secure their Russian gains as OTL), not west front attack, nothing in Italy or Salonika either.
While doing nothing: They offer the Allies (Italy, France and Britian and Belgium anyway), as a starting point for negotiations, their pre-war 1914 boundries, and offer as armistice conditions to further discuss peace, the German evacuation of occupied France, Belgium and Italy and the suspension of submarine warfare. The central powers announce that Alsace Lorraine, disposition of German colonies and Trieste will all be up for negotiations in the final peace as well as the future of the Balkans and Middle East.
Then they sit back and defend until the Allies agree to the above.
(perhaps this can never happen if Ludendorf is around, perhaps he has to die in a POD, but many German military and civilian leaders are aware of Germany's weaknesses and the fragility of their client allies by this point)
The 1918 offensives seem risky, only a slight temporary superiority of manpower can be achieved and even if the best hoped for results are achived, the complete roll up of the Somme and the destruction of the British armies there, there is no guarantee that ends the war and the Allies backed by a fresh America, just don't continue to build up strength, and enforce the blockade.
So what if the Germans just do nothing, no offensives anywhere (except to secure their Russian gains as OTL), not west front attack, nothing in Italy or Salonika either.
While doing nothing: They offer the Allies (Italy, France and Britian and Belgium anyway), as a starting point for negotiations, their pre-war 1914 boundries, and offer as armistice conditions to further discuss peace, the German evacuation of occupied France, Belgium and Italy and the suspension of submarine warfare. The central powers announce that Alsace Lorraine, disposition of German colonies and Trieste will all be up for negotiations in the final peace as well as the future of the Balkans and Middle East.
Then they sit back and defend until the Allies agree to the above.
(perhaps this can never happen if Ludendorf is around, perhaps he has to die in a POD, but many German military and civilian leaders are aware of Germany's weaknesses and the fragility of their client allies by this point)