September 1917 saw a continuation of the slaughter in Flanders. Good weather early in the month dramatically improved the British supply situation, and on 20 September another push in the Ypres Offensive got underway with the Battle of the Menin Road Ridge. Eleven British and Commonwealth divisions attacked five German on a relatively narrow front of 15,000 yards and by noon they had achieved most of their goals, when the inevitable counterattacks began – and failed.
The British had changed their tactics. In order to deal with the German forward strong points, such as pillboxes, they had brought in more heavy artillery and with spotting by aircraft they were able to neutralize many of the forward defenses and much of the German artillery. The advancing units leapfrogged one another, the following wave taking over the assault while the previous secured the captured ground against counterattack. This more limited and cautious approach worked, avoiding the massive offensive casualties typical of the Western Front and securing the gains until more resources could be brought up. The front line had moved 1500 yards, and if the Allies could achieve such gains each week, they could be in Berlin by Christmas of 1927.
German counterattacks continued, but with little effect, since the new cautious approach (and good weather) allowed the British to better fortify gains and resupply the troops before the counter assault came. On 26 September the British and Australians tried again, attacking Polygon Wood, and within a day achieved their limited objectives. The Germans were unable to regain any of the lost ground.
On 4 September an Anglo-French Conference met to consider sending aid to the Italian Front, which was certainly timely, inasmuch as the Eleventh Battle of the Isonzo ended in failure on the 12th. General Cadorna had gone all out on this one, concentrating three-quarters of his army for the attack, 52 divisions and 5200 guns against less than half those numbers on the Austrian side. Predictably, given the terrain (and the previous ten offensives), there was no breakthrough, though ironically the Austrians were on the brink when the battle ended (115,000 casualties) and would have folded under another assault. But the Italian army was completely exhausted (158,000 casualties), and the next offensive, the Twelfth Battle of the Isonzo, would be launched by the Austrians.
To the east Russia appeared on the edge of collapse. On 3 September the Germans captured Riga, and five days later General Kornilov marched on St. Petersburg in an attempt to purge the city garrison of Bolshevik troops and possibly to overthrow the Provisional Government in favor of a military dictatorship.. On the 10th Kerensky, however, declared Kornilov a traitor and himself dictator of Russia, and in a move of immense historical consequence he called upon the Bolsheviks for support, armed them and released their leaders (including Leon Trotsky – Lenin had fled to Finland) from prison.
As it happened, however, Kornilov’s troops, many sympathetic to the Bolsheviks, were already deserting, and with the revolt collapsing around him he surrendered on 14 September. He was imprisoned, escaped and ended up being killed fighting for the Whites in the Civil War. But Kerensky, who subsequent to Kornilov’s arrest proclaimed Russia to be a republic, was himself now in serious trouble. The Bolsheviks were now armed, their leaders were free to organize and agitate and with his treatment of Kornilov and other officers implicated in the conspiracy Kerensky had lost any hope of support from the military. The one time tiny radical Bolshevik faction was now poised to seize control of the capital of the Russian Empire.