Trench warfare
Trench warfare occurred when a revolution in firepower was not matched by similar advances in mobility, resulting in a grueling form of warfare in which the defender held the advantage. On the Western Front in 1914–1918, both sides constructed elaborate trench, underground, and dugout systems opposing each other along a front, protected from assault by barbed wire, mines, camouflaged trapping pits, and other obstacles. The area between opposing trench lines (known as "no man's land") was fully exposed to artillery fire from both sides. Attacks, even if successful, often sustained severe casualties.
The Trench (Dix)
The Trench (German: "Der Schützengraben"), but earlier known as "Das Kriegsbild" ("The War Picture") or simply "Der Krieg" ("The War"), was an oil painting by German artist Otto Dix. The large painting was made from 1920 to 1923, one of several anti-war works by Dix in the 1920s inspired by his experience of trench warfare in the First World War.