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 Guns of August
"The Guns of August" thus provides a narrative of the earliest stages of World War I, from the decisions to go to war, up until the start of the Franco-British offensive that stopped the German advance into France. The result was four years of trench warfare. In the course of her narrative Tuchman includes discussion of the plans, strategies, world events, and international sentiments before and during the war.