Now let us briefly glance at the campaign in the Vosges.
Look closely at the map on the next page, and notice the river Ill, a tributary of the Rhine. Its most important feeder is the river Thur, which runs down a long glen. It was in the valley of this river that the French made their chief advances during the winter. On 3rd January the Chasseurs Alpins, fighting their way down the valley of the Thur, captured the village of Steinbach, which stands just where the mountains fall steeply to the Alsatian plain, about ten miles as the crow flies from Mulhouse. Steinbach, which had been converted by the enemy into a series of blockhouses, was only secured after ten days of deadly combat.
The French were trying to take Mulhouse in flank, and they had therefore to capture the village of Cernay, which blocked the way. Meanwhile another force attacked Altkirch, to the south of Mulhouse, and quite close to the Swiss border. During the fighting some of the shells actually fell on Swiss ground. The force advancing from Steinbach could not capture Cernay, so it turned to the south, and tried to seize the village of Burnhaupt in order to attack Mulhouse from another angle. The village was taken by the French; but was retaken, though with heavy loss, by the Germans. Strive as they would, the French could get no nearer to Mulhouse.
If you look to the north of Cernay, you will see a spur of the Vosges known as Hartmannsweilerkopf. It stands 2,000 feet above the plain, and consists of rugged rocks covered with pine trees. He who possesses the kopf can command a very large part of the plain, for he can shell many roads and railway lines. The French greatly coveted it, and they had already established a small advance post on it. Let me tell you how this post was lost and won again. Soon after the fighting at Altkirch, violent winter storms began to rage. Snow fell without ceasing for a fortnight, and the upper glens were choked with drifts. When the sky cleared the chasseurs donned their skis and made some daring raids on German posts in the hills. The Germans were active too. On 19th January, during a blinding snowstorm, they climbed Hartmannsweilerkopf and attacked the French post at the summit. Four companies of chasseurs made a most gallant attempt to relieve the defenders, and for two days fought fiercely amidst the icy rocks and snow-laden bushes. They could, however, make no headway, and the post was captured by the Germans on 21st January.
Not until the 27th of March was it recaptured. On that day the Chasseurs Alpins made a fierce onset and carried the last line of the German defence, which was protected by a blockhouse. Once more they were in possession. At once the Germans hurried up reinforcements from all parts of Alsace, and the order went forth that the position was to be recaptured at all costs. They attacked in dense masses with great courage, and were able to entrench themselves hurriedly on the edge of the summit and along the slopes. During the night, however, the French Alpine troops were reinforced, and by dint of tremendous efforts guns were dragged up the icy slopes to the top of the spur, and were placed in position on the right and left flanks of the enemy. Next morning the chasseurs attacked the Germans and drove them back, while the guns assailed them with a terrible fire. The enemy made a stubborn resistance and brought up fresh troops, specially trained for mountain warfare and supplied with mountain guns. For three days the struggle continued, and at the end of it the whole of the slopes were clear of the enemy. The recapture of the spur was a great feather in the French cap. Again and again during the year the Germans made efforts to seize it, and more than once it fell into their hands. Late in December the Germans claimed to have recovered the whole position, but this was denied by the French.
