What is the setting of "Dulce et Decorum Est"? indoors or out, city or country, land or sea, region, nation, hemisphere
The setting is a battlefield during World War I. This war was fought between 1914 and 1918 all over Europe, so the battle that Owen describes could have taken place in France, Germany, Austria, the Netherlands, or other European countries. The no-man's-land mentioned in the poem is the area between the two armies, where it was almost certain that a soldier would be wounded or killed.