This northern campaign resembled autumn manoeuvres, and was mainly intended to test the value of the new tactics which Germany proposed to use next spring against a more serious foe. It was more realistic to experiment upon Russians than among themselves, and Von Hutier was selected to make the demonstration. The advance began in the last days of August, and on 1 September Von Hutier forced the passage of the Dvina at Uexkll, eighteen miles above Riga, which the Russians abandoned on the following day. Friedrichstadt fell next, and the Russians retired from Jacobstadt on the 21st. The Germans were now across the Dvina on a front of seventy miles, and pushed on towards Wenden, meeting with occasional resistance. But their next experiment was at the expense of the Russian Navy, which was even more demoralized than the Army, and had murdered its officers wholesale. On 12 October the Germans landed a force on the island of Oesel, and within a week had overrun that and the other islands at the mouth of the Gulf of Riga. On the 21st they crossed to the mainland, disembarking a force at Verder opposite Moen Island. There was little to hinder a march on Petrograd, had there been any sufficient inducement. But Petrograd in the hands of the Bolsheviks was worth more to the Germans than in their own; for a German occupation of the capital would have sterilized its miasmic influence over the rest of Russia, and the Germans had only advanced so far in order to get into touch with Finland and establish pro-German governments among the little nationalities of the Baltic littoral. They had, moreover, to economize their shrinking manpower, and their reserves were being called off from all the Eastern fronts to more urgent tasks elsewhere, leaving Russia to stew in its own disintegration.
Disaster had done nothing to check the distraction of Russian domestic politics. The Cadets had most of them resigned in July owing to the Government's complaisance towards the Ukrainian demand for independence; and Kerensky succeeded Lvov as Premier on the 22nd, while Kornilov took Brussilov's place as commander-in-chief on 1 August. But while Kerensky shed his right wing, he gained no support from the left. The Bolsheviks would not forgive him his offensive in July, nor the success with which he had suppressed the Leninite rising; and a great conference at Moscow on 25 August representing every shade of Russian disorganization produced some agreement on formulas but none on action. Early in September Kerensky came to the conclusion that a dictatorship was the only cure, and gave Kornilov the impression that the latter should fill the part. Another Bolshevik insurrection was brewing in Petrograd, and on the 7th Kornilov prepared to crush it, sending Krymov forward to Gatchina within twenty miles of the capital. Kerensky now took fright at the bugbear of a military restoration, denounced Kornilov as a traitor, and threw himself on the support of the Soviets. The cry that the revolution was in danger ruined Kornilov's chances; his surrender was arranged by Alexeiev's mediation, while Krymov committed suicide.
Such were Russian politics during the week in which the Germans overran the Dvina. A republic was proclaimed on the 15th, and the government entrusted to a council of five with Kerensky at its head. It lived no longer than its numerous predecessors in the revolution. Kerensky was rash enough to renew his breach with the Bolsheviks who had helped him to ruin Kornilov, and in November they rent the man of words. Trotzky organized the blow. There was little that was Russian about this Jew, whose real name was Leo Braunstein, although he was born in Odessa; but he possessed some practical capacity. Having secured election as president of the Petrograd Soviet, he had created a military revolutionary committee and a body of Red Guards, and on 5 November summoned the Petrograd garrison to place itself under its direction. Kerensky sought to defend his Government, but most of his forces went over to the Bolsheviks, and on the 7th he fled from the city. He attempted to return at the head of some dubious troops, but they were scattered by the Red Guards at Tsarskoe Selo on the 13th and Kerensky disappeared. What there was left of government in Russia passed into the hands of a self-constituted council of People's Commissioners with Lenin as its president and Trotzky its Foreign Minister; and on the 21st the council found a commander-in-chief in one Ensign Krilenko. His business was to offer an armistice to the Germans as a preliminary to suing for peace.
Russia had gone out of the war much faster than America came in. Early in May a flotilla of destroyers joined the British Fleet, and on 26 June the first division landed in France. But it needed six months' training, and a year would pass before the weight of American reinforcements would make much material difference to the Western front. That year was bound to try the Western Allies to the utmost, and the interval between the disappearance of Russia and the arrival of the United States as an effective combatant, gave the Germans the chance of reversing the decision which they felt had gone against them before the end of 1916. They regarded the Russian revolution as a miracle wrought in their favour; but it was only by degrees that they realized the extent of their apparent good fortune and proceeded both to use and to abuse it. From the first, however, the revolution changed for the worse the situation on every front, and enemy troops, released from fear of Russia, began to appear in the West, on the Isonzo, in Mesopotamia, in Palestine, and in the Balkans. The middle of treacherous April saw the tide checked that had been flowing so strongly since the year began.
The disappointment was not, however, entirely due to the gradual elimination of Russia, for that misfortune did not fall with much weight on the Western front until many months had passed, and depression there had its causes nearer home. Commenting on the British success at the battle of Arras, an Italian journal optimistically asked its readers what would be the plight of the Central Empires when real military Powers got to work, since so much had been achieved by the semi-civilians of the British Empire. Hopes also ran high in France. Nivelle, the new commander-in-chief, had conceived an ambitious plan of crushing the Germans on a front of fifty miles between the plateau north-east of Soissons and the river Suippe in Champagne; and this offensive, coupled with the British pressure in front of Arras, was to clear the Germans out of the greater part of occupied France. Nivelle proposed to repeat on a vastly extended scale his triumphs of the previous autumn at Verdun, and he made no secret to his Government of his confidence that Laon would fall as a result of the first day's fighting. Neither Haig nor Ptain had much faith in the possibility of the plan, but Nivelle had persuaded Ribot's Ministry, which had succeeded Briand's in March, and French expectations were raised to a giddy height. There were three main objectives: to clear the Chemin des Dames, to master the Moronvillers massif and other heights north and east of Reims, and to thrust between these two great bastions along the road to Laon. Each was an objective greater than that achieved in the battle of Arras, and all were attempted at once (*see Map, p. 67*).
The artillery preparation began on 6 April and the infantry attack on Monday the 16th, a week after that on the Vimy Ridge. The battle was not easy to follow, because the French were very reserved about their reverses, and the maps gave an erroneous impression of the line from which the attack started and that on which it ended. The French were commonly thought to be holding both banks of the Aisne all the way from Soissons to Berry-au-Bac, whereas in reality they had never recovered from their retreat in January 1915 to the south bank between Missy and Chavotine. Nor, except at Troyon, were they near the Chemin des Dames; and not only had the river to be crossed, but the formidable slopes, which the Germans had beeen meticulously fortifying for two and a half years, to be surmounted. The results of the first day's onslaught fell lamentably short of the extravagant anticipations. The banks of the Aisne were cleared, some progress was made up the slopes, and from Troyon, where the original line was nearly on the ridge, an advance was made along it. But on the whole the Germans maintained their grip on the Chemin des Dames. Nor was fortune much kinder in the gap between it and the heights east of Reims. The French Tanks, here first employed, were disappointing, and Loivre was the only gain. The 17th was spent in beating off counter-attacks west of Reims, while the French offensive spread east to Moronvillers. Here the same tale had to be told; gallantry carried various points of importance, but a month's fighting failed to give the French complete control of their first day's objectives. West of Reims on the 18th and following days Nanteuil, Vailly, Laffaux, Aizy, Jouy, Ostel, and Bray were captured by Mangin, but they were all below the Chemin des Dames, and April came to an end with the road to Laon as impassable as ever. Fresh attempts were made in May; Craonne was taken on the 4th, and the California plateau to the north of it and Chevreux in the plain to the east were seized on the 6th and held against counter-attacks, while east of Reims Auberive had fallen, and by the 20th the whole summit of the Moronvillers massif was said to have been secured.
The impression that the Chemin des Dames had been conquered was not removed until it really was gained by Ptain five months later; but there was contrast enough between the promises and the achievement to produce the deepest depression in France. On 28 April Ptain was appointed chief of staff and on 15 May commander-in-chief in succession to Nivelle, while Foch became chief of staff. Little was wisely revealed abroad of French despondency or the effect of the disappointment on the moral of the army. But French journals began to clamour for unity of command of all the forces in France under a French generalissimo, pour pargner du sang Franais, as one of them expressed it; and prudence constrained the higher command to revert to those limited objectives which Nivelle had abandoned. Joffre was sent to the United States to place the situation before the sister-republic; and but for American intervention France would have been nearer a peace of compromise in May 1917 than at any previous date in the war. The second battle of the Aisne gave rise to that miasma of dfaitisme, associated with the names of Bolo and Caillaux, which enfeebled the spirit and effort of France until they were revived by Clmenceau's vigorous stimulants.
Haig was also laid under an obligation to relieve the pressure and gloom by prolonging his Arras offensive and seeking to extract more from his victory than it would yield; and the second phase of that battle was fought under a shadow and under constraint. But if it resulted in serious losses, it brought some additions to our gains of ground. On 23 April Gavrelle and Gumappe were captured after desperate fighting; and on the 28th an advance was made at Arleux and Oppy. On 3 May the Canadians took Fresnoy, and the Australians trenches at Bullecourt, but the Germans kept up a series of stubborn counter-attacks, especially at Fresnoy, Roeulx, and Bullecourt, and Fresnoy was lost on the 8th. On the 14th we completed our capture of Roeulx, and on the 17th that of Bullecourt. The fighting died down, towards the end of May, and the scene was shifted farther north in June to the Messines-Wytschaete Ridge. During the month of the battle of Arras we had taken over 20,000 prisoners, and the French claimed more on the Aisne. We had also bitten into the Hindenburg "line." But that line had not been broken, mainly because it was not a line, having instead of none a breadth of several miles; and, apart from the important Vimy Ridge, the German position had not been greatly shaken. The warfare was one of attrition, and the true test was that of wastage, which can only be used when the losses on both sides are exactly known. There was evidence that the Germans were feeling the strain, but so was the Entente, and the influx of troops from the Eastern front, which began in April and was felt in the Arras battle, would more than compensate for the excess (if any) in German losses. It was also clear by this time that the Germans had gained another great advantage. They might lose the war, but they would lose it in France, and the Fatherland would not suffer the destruction and desolation which it had inflicted on all its foes except the British Empire and the United States. The Germans were wisely bent on fighting to a finish where Hindenburg had fixed his lines; they were beaten there, but snatched immunity from ruin for German soil out of their defeat. Nivelle's failure in April 1917 combined with the Russian collapse to preclude an Entente repetition of the German invasion of August 1914; and Lord Curzon's mental vision of Gurkhas encamping in Berlin was destined to remain a dream.
The breakdown of Russia and of the French campaign paralysed other offensives than those on the Western front, and a sympathetic inertia spread to the Balkans. At the end of February Sarrail had told his commanders that he intended attacking all along the line at Salonika in the first week of April as his contribution to the comprehensive Allied advance. But local operations in March, which succeeded in linking up the Italians east of Avlona with Sarrail's left, did not lead up to the expected climax. The offensive was postponed until 24 April, and then it was only British troops that were sent into serious action. The desired economy of French blood was effected by a French commander-in-chief at the cost of general failure. A frontal attack by General Milne's forces was ordered on the central position at Doiran; considerable losses were incurred, and gains were secured that made no essential difference to the situation. West of the Vardar and in front of Monastir no advance was attempted; but on 8 May Milne was told to repeat his effort, which had similar results to those of his first; and Sarrail was presently superseded by Franchet d'Esperey.