Ypres, battle of Ypres, second battle of Ypres

battle in World War I (1915); Germans wanted to try chlorine (a toxic yellow gas) as a weapon and succeeded in taking considerable territory from the Allied salient

• pitched battle — a fierce battle fought in close combat between troops in predetermined positions at a chosen time and place

• World War I, World War 1, Great War, First World War, War to End War — a war between the Allies (Russia France British-Empire Italy US Japan Rumania Serbia Belgium Greece Portugal Montenegro) and the Central Powers (Germany Austria-Hungary Turkey Bulgaria) from 1914 to 1918
• Belgium, Kingdom of Belgium, Belgique — a monarchy in northwestern Europe; headquarters for the European Common Market and for the North Atlantic Treaty Organization