On 3 May 1917, during the Nivelle Offensive, the French 2nd Colonial Division, veterans of the Battle of Verdun, refused orders, arriving drunk and without their weapons. Their officers lacked the means to punish an entire division, and harsh measures were not immediately implemented. The French Army Mutinies eventually spread to a further 54 French divisions, and 20,000 men deserted.

In two days the British and Indian infantry, supported by a creeping barrage, broke the Ottoman front line and captured the headquarters of the Eighth Army (Ottoman Empire) at Tulkarm, the continuous trench lines at Tabsor, Arara, and the Seventh Army (Ottoman Empire) headquarters at Nablus.

April and May saw the May Days, infighting among Republican groups in Catalonia. The dispute was between an ultimately victorious government—Communist forces and the anarchist CNT. The disturbance pleased Nationalist command, but little was done to exploit Republican divisions. After the fall of Guernica, the Republican government began to fight back with increasing effectiveness. In July, it made a move to recapture Segovia, forcing Franco to delay his advance on the Bilbao front, but for only two weeks. A similar Republican attack, the Huesca Offensive, failed similarly.

The Red Cross took control of Theresienstadt on 3 May.

On May 3, Izetbegović was kidnapped at the Sarajevo airport by JNA officers, and used to gain safe passage of JNA troops from downtown Sarajevo.