Popular enthusiasm, however, both in Russia and the West, knowing nothing of circumstances and conditions, and full of implicit faith in Russian prowess, immediately jumped to the conclusion that Rennenkampf was the man who was destined to alter the whole trend of the war. The campaign, therefore, assumed a rather exaggerated importance which was not remedied until actual events had their inevitable sobering influence.

At the beginning of the general advance, the Russians found themselves firmly established in the neighbourhood of Stalluponen. Before them lay a strong German army, under General von Hindenburg. The advantage in numbers was with the Germans, who were in the proportion of roughly three to two. On the other hand they were composed to a very large extent of reserves. The smaller Russian army was composed of fully trained first line troops. The coming operations, therefore, were a test of the comparative values of numbers and training. Sheer numbers supported by perfect discipline, such as that which obtains in the German army, can accomplish much in modern warfare. The advance of the Germans in the western theatre of war had already proved as much. And in these days when the personal factor in warfare, at least so far as the rank and file is concerned, has been practically eliminated, and the tendency is to rely for victory more and more on artillery and material superiority rather than on personal qualities, the age, training and fitness of the troops is of less importance than in the old days when battles consisted of downright fighting. The finest troops in the world are helpless when exposed to an efficient artillery attack. In point of artillery the two armies in Eastern Prussia were about evenly matched, the superiority, if any, being on the side of the Germans. Consequently, it will be realised that the Russians were faced with a difficult task.

The advance, which after the taking of Stalluponen had temporarily ceased, was resumed with vigour. The region to the north towards Tilsit was cleared of the enemy. Cavalry patrols scoured the country and there were innumerable minor engagements. In all of these the Russians were successful and the Germans were forced to withdraw their outposts towards the line Stillen, Gumbinnen and Goldap. The only engagement of any importance occurred some miles to the north of Stalluponen. Here a strong Russian force fell on a German army corps, which was occupying a rather advanced position. The fighting continued for practically a whole day, and in spite of fierce Russian attacks, the Germans held their ground. Towards the evening, however, their left flank was turned and soon they were in full retreat towards Gumbinnen. The Russians captured some hundreds of prisoners besides eight field guns, twelve cannons and three machine guns.

Inspired by this success the Russians pushed forward. But the Germans contested every foot of ground. The Russian movement, too, was considerably hampered by the excellence of the German means of obtaining information. Their airmen were everywhere in evidence, and displayed the greatest courage and daring in face of the Russian aeroplanes, which were mostly of the heavy Sikorski type. The latter, excellent machines though they are, were outmatched in point of speed by the German Taube machines, and were therefore unable to deal effectively with the menace from the air. The country, too, was infested with spies. Every movement of the Russians was signalled to the defending forces.

On one occasion a large force of Cossacks was sent to carry out a surprise attack on a German force occupying a village to the south of Stalluponen. As they moved forward, it was noticed that a haystack had caught alight. A tramp and a pipe were the explanation. The owner was greatly upset at his loss and made every effort to save his property. He worked with desperate energy, throwing bucket after bucket of water on the flames. The only result, however, was that a dense column of black smoke rose from the stack. The Cossacks pushed on. A couple of miles from the village they had to pass through wooded country. Suddenly a storm of lead swept through them. They had been ambushed. In close formation, and scarcely able to turn, they were mowed down by the score. When the few survivors returned to their headquarters the haystack was still smouldering, but the owner had disappeared. It was found subsequently that the “water” which he had so vigorously thrown on the flames was a chemical solution which had caused the dense clouds of smoke, serving to warn the Germans of the coming attack.

The advance, however, continued in spite of all the courage and cunning displayed by the Germans. The Russian cavalry in particular distinguished itself by its dash and bravery. The German advance guards and outposts were overwhelmed by the fury of its attack. Thanks to its superb, almost reckless, bravery and its bewildering mobility, the way was cleared for the main army, so that on the 19th it found itself facing a strong German army defending Gumbinnen.

In the meantime a Russian force had advanced in a north-westerly direction from Bialestock and had crossed the frontier at Prostken. Moving rapidly, it captured Lyck after a sharp engagement, and pushed on towards Lotzen. Here their progress was barred by a German army corps holding a strong position. Some desperate fighting ensued, but the Russians forced their way into the town and the Germans retreated northward along the lakes towards their main army at Gumbinnen.

Obviously the time had now come for a decisive engagement. Any further retreat on the part of the Germans would entail the abandonment of Insterburg, a most important railway junction, the possession of which was the key to the whole of the country lying east of Königsberg and Allenstein. The Germans, faced by the main Russian army on the south-east towards Goldap, and with its right flank threatened by the victorious force marching on from Lotzen, prepared for a determined resistance.

As early as the 17th the civilian inhabitants had been ordered to leave the town, at the same time reinforcements were brought up from the west and north so that the strength of the defending army amounted to about 200,000 men. On the morning of the 20th, the Russian right rested on the village of Pilkallen, its left on Goldap. Everything was in readiness for a determined onslaught. At dawn the battle began with a terrific artillery duel. Soon the shells of the heavy German guns were causing havoc in the Russian lines, but after a time the Russian artillery began to manifest a superiority, and some of the enemy’s guns were silenced. The Russian infantry then moved forward to the attack, and some of the most desperate fighting of the war took place.

The Russians were subjected to a merciless fire from machine and field guns. On all sides men were falling. But they never wavered for an instant. On and on they pressed until they reached the German trenches. There the bayonets got to work and soon the defenders were forced to give ground. But they were by no means defeated. Time after time they hurled themselves forward in the most desperate counter attacks, but the Russians succeeded in holding their own.