“Lions led by donkeys” — is the contempt for First World War generals deserved?

THE SHORT ANSWER

• Firepower outran mobility by a generation. Between 1870 and 1914 firepower multiplied — magazine rifles, machine guns, recoil-absorbing artillery — while battlefield mobility stayed at horse and boot, and battlefield command at whistle, runner and cuttable wire. Armies could tear holes but not move through them faster than the enemy could seal them. The internal-combustion answer (tank, truck, ground-attack aircraft) existed by 1918 only; the gap between those dates is the trench war.
• The defender’s railway advantage. The Western Front sat in Europe’s densest rail country, and lateral lines let a defender shift a division overnight. The attacker’s advance destroyed the very infrastructure he needed to continue — roads shelled by his own barrage, rail gauges to convert, ammunition hauled by horse over a moonscape. Success was self-limiting: the deeper you broke in, the weaker you got and the stronger the defense grew.
• Density: no flanks to turn. In the west, millions of men held 700 km — enough to be strong everywhere. Compare the Eastern Front on this map: twice the length, similar numbers, so it bent and swung in ways the west never could. Deadlock was not universal law but force-to-space ratio; where density fell (Palestine, Macedonia in 1918), maneuver returned.
• Attack anyway: the political imperative. Germany stood on French and Belgian soil; no French government could sit still, and coalition politics demanded offensives to relieve allies — Verdun pulled British attacks, Russia’s straits pulled Gallipoli. Many bloody offensives were less military judgment than alliance payments. Judge the generals inside that constraint, then judge the ones who refused to learn inside it too.

WHAT IT CHANGED

Attrition becomes the strategy. If the line cannot be broken, kill the men holding it faster than they are replaced: 1916 makes this explicit doctrine at Verdun and the Somme. The war’s center of gravity moves from the map to the census and the factory ledger.

The siege workshop. Deadlock breeds innovation on a monstrous scale: poison gas (Chapter 4), mining and counter-mining, aerial photography and sound-ranging, creeping barrages, and at last the tank — each a key tried against the same lock, each answered within months. The 1918 combination that finally works is assembled from these failures.

Total war reaches home. Holding the line consumed nations: conscription spread (Britain, the volunteers’ nation, adopted it in 1916), women entered war industry by the million, food was rationed, dissent policed. The distinction between soldier and civilian — already dying at Louvain — eroded everywhere. Remember this when the blockade chapter asks who a legitimate target is.