The challenge is as follow: With a POD no earlier than 1870, make Russia and Germany become allied and at some later time fight a war together against France, the UK and the Ottoman Empire. The time when the war is fought and which other countries that take part is up to you, but the alliance should last until at least the time when the war is finished. What will trigger the war and where will it start?
From earlier discussions where a Russo-German alliance has been discussed, the main problem that has been suggested was that Russia needed big loans in order to industrialize and that Germany did not have enough money to guarantee a loan. I do not have sufficient knowledge to assess this, but if it is a valid argument, it would somehow be part of the challenge to consider how to solve this.
Such an alliance would have obvious benefits for both Germany and Russia, especially for Germany, as the country then could consentrate on its western border and could get resources from Russia. There might be a conflict over the Polish areas, but Russia would be very interested in increasing its influence around the Constantinople area and also had conflicts with Britain in Central Asia. It would probably also be easier to keep the United States outside such a war, as Germany could trade with Russia and therefore would not have to fight an unrestricted submarine warfare. If Germany and Russia were able to win the war quickly, they would probably also avoid social disturbances in their own countries. Since Germany only would have one front and would also be reinforced by Russians, I assume that a quick victory would be more likely than in OTL WW1.
From earlier discussions where a Russo-German alliance has been discussed, the main problem that has been suggested was that Russia needed big loans in order to industrialize and that Germany did not have enough money to guarantee a loan. I do not have sufficient knowledge to assess this, but if it is a valid argument, it would somehow be part of the challenge to consider how to solve this.
Such an alliance would have obvious benefits for both Germany and Russia, especially for Germany, as the country then could consentrate on its western border and could get resources from Russia. There might be a conflict over the Polish areas, but Russia would be very interested in increasing its influence around the Constantinople area and also had conflicts with Britain in Central Asia. It would probably also be easier to keep the United States outside such a war, as Germany could trade with Russia and therefore would not have to fight an unrestricted submarine warfare. If Germany and Russia were able to win the war quickly, they would probably also avoid social disturbances in their own countries. Since Germany only would have one front and would also be reinforced by Russians, I assume that a quick victory would be more likely than in OTL WW1.