Around Mory on the northern end of the battle field the Germans attacked with superior numbers and the fighting was especially fierce. The British held on during the day, but toward evening the Germans gained a foothold in the village after close fighting that lasted some hours. The Germans advanced for this attack from Croisilles and for a long time were held back by a company of British gunners who were stationed on high ground, from which point of vantage they mowed down the enemy with a grilling fire.

The most critical period for the Allies since the offensive was launched was in the afternoon and the night of March 22-23, 1918, when the British lost important positions one after another as German divisions in successive masses carried everything before them, regardless of losses. General Gough's Fifth Army especially suffered, being hit by Von der Marwitz on the north, and Von Hutier on the east. Under these sustained hammer blows the entire front gave way and the British were forced to retire across the Somme, pursued by Generals Lüttwitz and Öttingen. Lower down Generals Webern and Von Conta, with troops of the Seventh Army under Von Gayl, captured Ham, and forced the French who had crossed the Oise back to Chauny.

This was the blackest hour for the Allies. Von Hutier had rolled up the British right wing. The road to Paris down the Oise was no longer a doubtful adventure. Unless the broken link between the French and British could be restored the Germans had accomplished what they set out to do.

In this crucial hour for the Allies, when the demoralization of the Fifth British Army was complete, General Carey with a scratch division kept it in touch with General Byng's Third Army on the north over an eight-mile gap, and the French General Fayolle saved it in the south over a thirty-mile gap between it and the Sixth French Army.

As the result of the first two days' fighting the Germans claimed to have captured 25,000 prisoners, 400 guns, and 300 machine guns. It was also claimed that between Fontaine-les-Croisilles and Mœuvers German forces had penetrated into the second British positions and captured Vaulx-Vraucourt and Morches, the former being about three and a half miles, and the latter two and a half miles, behind the former British front. It was further claimed by the Germans that the British after evacuating their positions in the bend southwest of Cambrai were pursued through Demicourt, Flesquières and Ribecourt. Between Gonnelieu and the Omignon stream the first two British positions were penetrated and the heights west of Gouzeaucourt, Heudicourt, and Villers-Faucon were captured.

The German official report stated that the battle of attack against the British front was under command of the kaiser.

The Germans sprung a new form of frightfulness on the Allies when at 8 o'clock in the morning of March 23, 1918, they bombarded Paris with long-range guns. At intervals of about twenty minutes shells of 240 millimeters (about 9.5 inches) reached the capital, killing ten persons and wounding others. The shortest distance from Paris to the front was over sixty-two miles. The first daylight aeroplane raid followed this bombardment, but did little damage. Public interest was centered on the mysterious gun that could drop shells on the city from such a great distance. Pieces of shells examined were found to bear rifling marks showing that they had not been dropped, but were fired from some kind of gun. Later the French located several of these "mystery guns," and some were destroyed. The only purpose they could serve was to terrify the people of Paris, otherwise they were of no military importance.

While the British front was being overrun by the German hordes the French front was subjected to violent artillery fire, especially south of the Oise in the Rheims region, in Lorraine, between Harracourt and the Vosges mountains and the heights of Alsace. The Germans made only one attack on the French lines in the region of Blemeray, where they were dispersed with considerable losses in dead and prisoners.

South and north of Péronne the Germans renewed their attacks on the British front throughout the day of March 24, 1918. South of the city they succeeded after heavy fighting in crossing the Somme at some points.

North of Péronne violent attacks were directed against the line of the Tortille River (a tributary of the Somme), where the British were finally forced to withdraw to new positions. Although fighting continued at different points during the night, the situation had not changed. British troops held the line of the Somme River to Péronne. German troops that attempted to cross the river at Pargny were driven back. The British right was now in touch with the French, and continued to hold their positions to the north of the Somme at Péronne after beating off a number of attacks made by the Germans on this front during the early hours of the night.