The First Battle of Ypres, also called the First Battle of Flanders (French: 1re Bataille des Flandres German: Erste Flandernschlacht), was a First World War battle fought for the strategically important town of Ypres in western Belgium in October and November 1914. The German and Western Allied attempts to secure the town from enemy occupation included a series of further battles in and around the West Flanders Belgian municipality.

Date 19 October – 22 November 1914 Location Ypres, Belgium Result Allied victory
Belligerents
France Belgium United Kingdom	German Empire
Commanders and leaders
Joseph Joffre Ferdinand Foch John French Albert I of Belgium	Erich von Falkenhayn Albrecht, Duke of Württemberg Rupprecht, Crown Prince of Bavaria Gustav Hermann Karl Max von Fabeck Alexander von Linsingen
Strength
French Army: 3,989,103 Belgian Army: c. 247,000 British Army: 163,897 Total strength: 4,400,000	5,400,000
Casualties and losses
British Army: 7,960 killed 29,563 wounded 17,873 missing 2,128 unknown cause Total: 58,155	8,050 killed 29,170 wounded 10,545 missing Total

The strategy of both the Allied and German armies is not entirely clear. The accepted and mainstream reasoning for the Ypres battle was the British desire to secure the English Channel ports and the British Army's supply lines; Ypres was the last major obstacle to the German advance on Boulogne-sur-Mer and Calais. The French strategy was to prevent German forces from outflanking the Allied front from the north. This was the last major German option, after their defeats at the First Battle of the Aisne and First Battle of the Marne. The Ypres campaign became the culmination of the Race to the Sea. The opposing armies engaged in offensive operations until a big German offensive in mid-October, which forced the Allies onto the strategic defensive and limited to counter-attacks.

The battle highlighted problems in command and control for both sides, with each side missing opportunities to obtain a decisive victory. The Germans in particular overestimated the numbers and strength of the Allied defences at Ypres and called off their last offensive too early. The battle was also significant as it witnessed the destruction of the highly experienced and trained British regular army. Having suffered enormous losses for its small size, "The Old Contemptibles" disappeared, to be replaced by fresh reserves which eventually turned into a mass conscripted army to match its allies and enemies. The result was a victory for the Allies, although losses were particularly heavy on both sides. The battle completed the entrenchments of the "race to the sea" and inaugurated the static western front. Mobile operations would not resume until 1918.