KnowraSecond Battle of YpresLinked fromLinked fromThe 8 pages that link to Second Battle of Ypres, each with the reason it gives.All 8Broader topic 4Related 4Chemical warfareBroader topic: The attack became a pivotal early instance of large-scale chemical warfare.Chemical warfare agentBroader topic: The attack marked a major early use of chemical agents in World War I.Mustard gasBroader topic: It provides context for the earlier chemical warfare that preceded mustard's battlefield debut.Chemical weapons in World War IBroader topic: The attack made chemical warfare a major feature of the Western Front.In Flanders FieldsRelated: McCrae served near Ypres when the poem’s battlefield imagery took shape.Blister agentRelated: It marked an early turning point in chemical warfare, before mustard agents became prominent.First Battle of YpresRelated: It was the next major battle fought around the salient established in 1914.John McCraeRelated: McCrae served near Ypres, where the battle’s casualties shaped his wartime writing.