In the fourth and final phase of the battle the Germans tried to pierce the Allied line between Ypres and the Lys through Wytscheate and Messines. That defeated, the great mass assault was made against Ypres from the east by the Prussian Guard on November 11.

While German infantry attacks continued to be made until November 15, they were no more than the sullen efforts of a baffled but still bitter foe. The stress of the fighting lasted from October 11 to November 11, that is exactly one month. For a second time in this Western campaign there had been in a great pitched battle, a trial of strength, and for a second time the forces of Germany had, as on the Marne, gone down.

It is important to keep these phases of the Battle of Ypres in mind. They throw light on the battle which was concurrently, from October 17 to October 31, being fought on the Yser.

From its source in the hills west of Ypres to the sea the whole course of the Yser does not exceed 20 miles. It is a stream, however, of a quite exceptional character. Running through a tract of country for the most part below sea level, it is more like two streams flowing in the same direction, and connected by winding cross channels. On a smaller scale the like effect may be seen in the channels on stretches of flat shore at ebb tide. The Yser was of course nothing more originally than a network of such channels running through the mud flats, and though all this part of the Lowlands was more than a thousand years ago finally reclaimed from the sea, the waters continued to flow along the ancient beds. They have been connected besides by canals. In the Middle Ages when Ypres was a great centre of trade, and one of the most populous cities of Europe, these canals were busy arteries of commerce. The country between Ypres and the coast, one of the most fertile tracts in the world, was at the outbreak of this War full of quaint and picturesque memorials of its former importance. In modern days, and more especially under the wise and beneficial rule of the present Royal House of Belgium, it was a picture of peaceful and settled wealth.

On the Yser half-way between Ypres and the sea was the old town of Dixmude, with a church and a hôtel de ville which were masterpieces of Gothic architecture. Towards the coast, where the line of sand dunes has in part covered the ancient dykes, the river takes a sharp bend to west. A tract about two miles wide and three miles long is thus enclosed on the east between the river channels on the one side and the sea on the other. This was occupied by the little sea-side residential places, Lombartzyde and Westende. Nieuport lay on the west bank of the river a mile or more inland. The Yser here becomes one channel, deep enough to be navigated by shipping of moderate draught. It was crossed at Nieuport by five bridges, Between them lay the series of locks dividing the tidal part of the Yser from the inland reaches. The locks were those used to regulate the river overflow at low tide while keeping out the sea when the tide was at flood.

There are two points of some importance on the west bank of the Yser between Dixmude and Nieuport—the villages of Pervyse and Ramscappel. Both are on the main road connecting the two towns. Five miles farther to the west lies the town of Furnes, already mentioned as the meeting place of the great road from Ypres with that running along the coast from Ostend through Nieuport and on to Dunkirk and Calais. The great roads, and indeed most of the main roads and canals in this part of Flanders are carried along embankments. Before the war these were mostly bordered with trees, affording in winter shelter from the cold winds which sweep over the country from the North Sea, and welcome shade in summer. It was a land of deep repose, and for nearly 100 years and until the coming of the Goth, nothing save the mellow chime floating distantly from some tall and noble spire reared in far off days by pious hands, had broken in upon its dreaming.

General Joffre issued the first orders directed towards his great scheme of military envelopment on September 11. This promptitude was essential. When in the first phase of the battle of Ypres the British drove the Germans back upon Lille, the strategical effect was to tear in the German front a gap from Lille to beyond Thourout, a distance of nearly thirty miles. The Germans had to mass their forces at Lille in order to keep their hold on that place.

Through the gap thus made the French pushed forward four divisions of cavalry, two divisions of their Territorial troops, and a division of marines, 6,000 strong. Already, however, on October 15, the Germans had, north of the gap towards the coast, two army corps, and these were in the course of the next two or three days reinforced by two others. The objective of these troops was to seize Nieuport and the crossing of the Yser.

The Belgian Army reached Nieuport from Antwerp on October 16. That army was, however, not immediately fit for further service. In these circumstances the line of the Yser from Nieuport to Dixmude was held by the French cavalry and marines, while the 1st division of British infantry was thrown forward to Bixschoote, with the 2nd division in support. Later along the Yser and round Ypres, where after November 20 they relieved the British, the French forces on this part of the front were brought up to five army corps. At this date in mid October, however, all that could be opposed to the German mass aggregating 240,000 men detailed to seize the crossings of the Yser, were these French cavalry, one division of marines, and two divisions of British infantry, not 45,000 in all.

The first German thrust against Nieuport was made on October 17, and it must inevitably have succeeded had it not been that the enemy came within range of and were enfiladed by the fire of a British flotilla. This equivalent to a destructive attack in flank wrecked the attempt. The shells of the warships raked the German lines as far inland as Dixmude.