Besides this numerical and material superiority, Germany possessed the additional advantage of a unique commander: Ludendorff, master of the hour, at once absolute military chief and political dictator. On the other hand, whilst the Allies were closely united by cordial friendship, sealed on the field of battle, their armies were independant units, separately commanded, each having its own reserves concentrated behind its particular front.
General Pétain among his "poilus"
On February 3, 1917, the United States of America ranged themselves on the side of the Allies, but their eventually powerful effort could not make itself seriously felt before the summer of 1918. In March 1918, four American divisions were in France, and a million more men were expected by the following Autumn, but the Germans were convinced that they would have the Allies beaten before then.
The moral strength of the opposing forces constituted one of the most important factors of victory.
During 1917, after the Allies' Spring Offensives, a wave of lassitude had lowered the fighting spirit of certain units of the French Army. However, the morale of the French Army had fully regained its former high level, when the great German offensive of March 1918 was launched.
The British Army had in the meantime perfected its training, and acquired, in addition to experience, splendid fighting qualities.
The Germans, badly shaken in 1916 by their failure at Verdun and by the Allies' Offensive on the Somme, had, in consequence of Russia's collapse, recovered all their former arrogant confidence and pride.
But the Allies' blockade, despite Germany's ruthless submarine warfare, tightened, and each day the menace of famine increased.
Triumphal announcements of victory, and promises of an early German peace appeared periodically in their press, yet still the war dragged on. Something had to be done to end it all, whatever the cost, and so the "Peace Offensive" was decided on.