By 1916 the great buildup of the British army had produced a massive
force designed to be thrown into action side by side with the forces of
France. A potent force pushing for such a British effort was the growing
feeling in France that its army was bearing the brunt of the fighting and
losses on the western front. Indeed, total French casualties in 1915—killed,
wounded, missing in action, and taken prisoner—reached the sickening
figure of 1,549,000 men.i The joint offensive was scheduled to take place
in spring around the Somme, but Germany struck first. The renewal of
German offensive action on the western front did not aim at a breakthrough
or a quick victory. In the view of General von Falkenhayn, Germany's best
hope rested in a battle of exhaustion, forcing the French to fight under
unfavorable circumstances in terms of terrain and supply, and inflicting
intolerable losses on France's army. With France—what Falkenhayn called
"Britain's arm on the continent"—crippled, the war could be brought to a
negotiated conclusion favorable to Germany.
The German offensive at Verdun, a historic fortress that no French
government could lightly abandon, began in the snows of winter. The
carnage started in February and lasted until the close of the year: its duration
of ten months makes it the longest battle in history.
German attacks hurt their own army almost as badly as they bled France's
forces. Their assaults ran into tenacious French resistance. Advancing
infantry found, as the Allies had in 1915, that artillery barrages left enough
enemy machine guns intact to inflict intolerable casualties. Much of the
fighting consisted of massive exchanges from heavy guns, and both sides
inflicted comparable losses on one another. French leaders, notably General
Philippe Petain, the army's leading specialist in defensive operations, kept
their heads, and Petain maintained the army's stability by rotating units
quickly in and out of Verdun.
Located in an exposed salient and supplied by a single road, Verdun
appeared to be impossible to supply. Petain found ways to bring in the
needed supplies: improving the one available road (la voie sacree) and
developing a massive and continuing flow of truck traffic. By the closing
months of the year, Petain's successor at Verdun, General Robert Nivelle,
took the offensive. After the prolonged slaughter, the battle lines were close
to their starting point. Nearly 400,000 Frenchmen lost their lives in this
hellish place; the Germans emerged almost equally ravaged, with 340,000
killed or missing.