January 27, 1915.
Great Britain arranged a loan of five million pounds to Romania.
March 13, 1915
British offensive defeated at Neuve Chappelle (France).
March 18, 1915
Treaty of London was signed between Great Britain, France and Russia. Russia was ceded the right to annex Constantinople, the Bosporus, the Dardanelles, and more than one half of Turkey-in-Europe.
April 5, 1915
French offensive to capture the Woevre defeated.
April 1915.
German army conducts a successful spoiling offensive at Artois.
April 12, 1915
In Russia, an explosion destroyed the large Okhta Munitions Factory east of Petrograd, which seriously affected munitions supply for the army.
May 2, 1915.
Beginning of Gorlice-Tarnow offensive.
May 8, 1915.
German army captures the key Baltic port of Libau.
May 9 – June 16, 1915
French army defeated at Artois.
May 23, 1915.
Italy joins Entente. Very bad timing (for Italy) as Austro-German offensive against Russia is just starting to show results. However this does tie about 10 Hapsburg divisions to the Isonzo.
June 2, 1915
At Petrograd, French Ambassador Paleologue met with munitions multi-millionaire Putilov, who informed him that the days of Tsarism were numbered; that revolution is inevitable; the munitions problem was not merely a technical problem, the question of labor and output had to be solved; and the whole administrative system of Russia must be reformed from top to bottom.
June 3, 1915
Fortress of Przemysl recaptured by Gen. Mackensen’s forces.
June 9 – 11, 1915
Moscow erupted in three days of anti-German rioting and violence. Four hundred seventy five German-owned businesses and 207 private homes were destroyed. Over six hundred people were injured before order was finally restored. Rumors of treason circulated among the people, accusations were openly made against the Tsar, the Empress, Rasputin and members of the court. The mob in Moscow demanded that the Empress be shut away in a convent, the Tsar to be deposed, Rasputin to be hanged, with Grand Duke Nikolai Nikoleavich to be crowned as Tsar Nikolai III.
June 20 – September 27, 1915.
German army seizes the Argonne. Strategically significant as it wrecks French chances for an offensive in Champagne.
June 22, 1915
Austro-German forces recapture Lemberg. This is a major Ost Front fortress.
June 30, 1915
In Petrograd, the new War Minister General Polivanov warned his colleagues that within the Russian Army “demoralization, surrender and desertions are assuming huge proportions.”
July 20, 1915
At Petrograd, Russian Army Chief of Staff General Belyaev pleaded with French Ambassador Paleologue to urgently request that France supply them with rifles. Belyaev informed him that they needed one and a half million rifles to wipe out the present deficit. Currently Russian factories are turning out only 60,000 per month, which they hoped to increase to 150,000 in October
Summer 1915. German diplomatic negotiations with Romania.
Unlike Italy, Romania had the sense not to join the Entente when they were losing. As Austro-German victories continued to pile up Romania resumed normal trade with Central Powers with one notable exception.
Romania would not allow ammunition shipments from Germany to Constantinople to transit Romanian territory. Ultimately this had strategic consequences. Germany felt compelled to conquer Serbia in order to open a rail line to Constantinople. Fall 1915 invasion of Serbia effectively ended chances to finish off Russia just as they were on the verge of cracking. German chances for victorious conclusion of WWI slipped away forever.
Point of Departure. German Government sweetens the pot.
Historical Germany offered Bessarabia to Romania.
In a rare moment of common sense Kaiser Wilhelm II recognizes that Germany has a chance for outright victory during 1915. Not the time for cautious diplomacy. In the event of German victory Romania will also receive Odessa, the most important Russian Black Sea port. In return Romania will allow discrete German delivery of munitions to Constantinople.
Fall 1915. Death of Imperial Russia.
Rather then being diverted to Serbia, Army Group Mackensen (fall 1915 Heer schwerpunkt) drives to Pskov and then to outskirts of St. Petersburg. That city was WWI Russia’s most important munitions production center.
When Germany cuts rail lines entering St. Petersburg from south it effectively ends munitions production in that city just as happened historically during 1941. But unlike WWII, WWI era Russia doesn’t have large scale alternate production centers in Ukraine and Urals. Russian Government sues for peace on whatever terms they can get from Germany. Followed by an internal power struggle. It’s a safe bet weakling Czar Nicholas II will not remain in power.