FROM STORM TO CALM.
When the Germans entered Warsaw the German High Command had to decide what the next move was to be. Should they entrench on the ground already won, and make the line of the Niemen, the Narev, and the Vistula a great bulwark of defence which would defy all Russian counter-attacks for many a day to come, or should they push their armies forward? There were good reasons why a halt should be called on the river line. The troops were weary with long months of fighting, and badly needed rest. On the other hand, the Russian armies were not crushed, but it seemed likely that another big push would destroy them altogether. With Warsaw gone, the southern railway cut, and the Narev line crumbling, it appeared almost impossible for the Russians to escape. The army in Courland was almost within striking distance of the Petrograd railway, and once this was captured in the neighbourhood of Dvinsk and Vilna, the whole Russian front would be split up into separate armies, each of which might be destroyed. Another great effort, and the Tsar would be on his knees suing for peace.
The die was now cast; the Germans decided to push forward. The Russians were in perilous plight; for on the right the Germans bade fair to envelop their armies, and in the centre von Mackensen was thrusting them back towards the Marshes of the Pripet, in which they might be caught. The Grand Duke's business was to get his armies away eastward, and to refuse at all costs to fight pitched battles. In this he succeeded, and by doing so wrote his name high on the roll of great generals.
You will remember that the bridges across the Vistula at Warsaw had been blown up. Prince Leopold now collected a number of the thousand-ton barges which ply on the river, and constructed a floating bridge, across which he carried a railway line. By 10th August he began to advance; but he found himself constantly held up by Russian attacks, and he made but slow progress. By 16th August von Gallwitz was across the Petrograd line, and von Mackensen was within twenty miles of Brest Litovski. The Russians had already fallen back, and were lying in front of the railway from Ossowietz through Bialystok to Brest. They were, however, still holding out in front of the old city and fortress of Kovno.
Glance at the position of Kovno. You see (page [311]) that it stands on the Niemen, at the point where the course of the river swings to the south. Should Kovno fall, the other fortresses on the Niemen would be in great peril, and the enemy would have a direct route to Vilna, where they would be in the rear of the Russians. On the day that Warsaw fell, the Germans were near enough to Kovno to begin the bombardment. For twelve days they rained shells upon the forts, while the infantry fought for the outworks. By this time the city had been stripped, and its valuable contents had been sent eastwards. Nevertheless it had to be held while arrangements were made for the Russian line to retire. The gunners in Kovno stuck to their posts for twelve desperate days, and all the time the big siege howitzers of the enemy played havoc among them. Nevertheless, the Russians held on, and, what is more, continued to work their guns.
By Sunday, 15th August, the forts were in ruins, and two days later the heroic garrison yielded. The Germans claimed 20,000 prisoners and over 200 guns. The Russians, however, were fully prepared for this loss. The holding of Kovno was a forlorn hope, and the men and guns in it were sacrificed to gain time.
The fall of Kovno meant that the Russian right must now retire, and a day later it was clear that the centre must retire too. The Germans had cut the railway to the north of Brest, and were now attacking the western forts of the stronghold. Next day Novo Georgievsk, which had been besieged for about three weeks and was now a huddle of ruins, had to yield, and 20,000 of the garrison, along with 700 guns, most of which had been rendered useless, fell into the hands of the Germans. Shortly before the surrender, a daring Russian aviator was entrusted with the maps and secret papers of the fortress. He ascended, and though furiously assailed by the anti-aircraft guns of the enemy, managed to fly clear and carry the precious documents into safety.
Two of the three great fortresses forming the Polish triangle had now gone; Brest alone remained, and its doom was already sealed. While the Russians were preparing for a further retirement, their right, which rested on the Baltic Sea, was threatened with a new danger. On Sunday, 10th August, a German fleet tried to force a way into the Gulf of Riga; it was beaten off, but the attempt was renewed on the 15th and on the 16th. During a thick fog the Germans got into the Gulf on the 16th, and two days later tried to land troops at an unfortified port on the road to Petrograd. Four very large flat-bottomed barges, filled with troops, attempted to get ashore on the 20th; but the Russian light craft swooped down upon them, and captured or destroyed the whole of the landing force. Meanwhile a naval battle was going on throughout the length of the Gulf. The Russians lost an old gunboat, while the Germans had eight destroyers and two cruisers either sunk or put out of action, and a submarine driven ashore. On the 21st the Germans left the Gulf. Their attempt to outflank the Russian right had failed.
During the previous twenty days the Germans in the centre had pushed forward no less than one hundred miles; but the Russian armies had eluded them, and no crushing battle had taken place. The Germans had not yet given up all hope of overwhelming the Russians, but for the time being they were anxious to secure a strong line on which they might maintain themselves during the coming winter. They had also a new campaign in view. Already they were thinking of forcing a way through the Balkans to Constantinople, so as to open a road to the east and fling such forces into Gallipoli as would drive the British and French into the sea.
Now we must return to the doomed fortress of Brest. On the day that the German warships left the Gulf of Riga, Prince Leopold was close to the western walls of the fortress, while von Mackensen, east of the Bug, was threatening to take the forts from the rear. On 25th August Brest Litovski fell. It had held out long enough to enable the Russians to get away with the guns and supplies, and only a little wheat was left behind. Soon after the Germans entered the place a mine exploded and destroyed a thousand of their troops.