The 1918 German Spring offensives had ground to a halt by mid July. With the Germans exhausted and the arrival of fresh American troops, the Allies were ready to launch their own offensives. Starting in early August, they soon forced the Germans to retreat.
British troops landed in Archangel (Arkhangelsk), northern Russia, with the intention of recovering Allied war materiel (which had been supplied to the Russians while they were still involved in the war) and resurrecting the Eastern Front by linking up with the Czechoslovak Legion and supporting anti-Bolshevik forces. Upon arrival they discovered that the war materiel had already been moved up the Dvina River by the retreating Bolsheviks. Over the following month, the British were joined in Archangel by French and American forces.in wikipedia
By July 1918, the German offensive in the West had lost momentum just as the American Expeditionary Force began arriving in France. Seizing initiative, Allied command sought to bring the war out of the trenches by shortening artillery attacks and bringing a continuous, layered attack near the city of Amiens. It was hoped that such offensives could end the war by late 1919, but after 50,000 German personnel surrendered, the Allies decided to press on indefinitely.in wikipedia
In the last major Allied offensive of the Sinai and Palestine Campaign, the British Egyptian Expeditionary force under General Edmund Allenby attacked the Ottoman Yildirim Army Group along the Judean coast, in the Judean Hills in front of Nablus, and across the Jordan River towards Amman. The British were supported by Arab rebels, who raided the Ottoman railways and capture Daraa. The Allied victory all but destroyed the Ottoman army in the Levant, leaving the route to Damascus open.in wikipedia