In Turkey, the formal annointing ceremony of the girding of the Sword of Osman made Mehmed VI the 36th Sultan of the Ottoman Empire and 28th Caliph of the Ottoman Caliphate. Of course, this made no practical difference to Turkey’s conduct of the war.
https://www.youtube.com/watch?v=WLKghFyL8tg
The attack on Hamel began at 0300 when the British artillery opened up. Ten minutes later, the guns added smoke shells, leading the Germans to conclude they were being gassed and so to don their gas masks. What was actually happening was that 60 Whippet and Mark V tanks were moving into final positions, their shapes obscured by the smoke, and their engines covered by the noise of the bombardment. Five minutes later, the British guns shifted to a rolling barrage, and the Australian and American soldiers went forward.
There was one problem: the Americans were so anxious to prove themselves that they tried to advance ahead of the Australians. This got them into the trailing edge of the artillery barrage, and a number of men were killed and wounded. Nonetheless, the American and Australian soldiers attacked with a will.
This was the combat debut of the British Mark V tank, which could manage a maximum speed of 8 km/h (5 mph) under the best conditions, and the cratered terrain was not the best. Often the infantry arrived soewhat in advance of the tanks, and there was desperate hand-to-hand fighting. Since the Allied troops outnumbered the German defenders by about 7,000 to 5,600, they prevailed. When the tanks arrived in time, the Germans often surrendered or hastily retreated, for unlike the Whippet, the Mark V's generally mounted cannon.

General Monash had calculated that the attack would achieve its objectives in 90 minutes –- it actually took 93. About 1,400 of the Allies were killed or wounded, but they inflicted roughly 2,000 German casualties. In addition, over 1,000 Germans were captured, along with considerable quantities of equipment, both German and British which had been taken by the Germans in their earlier offensives. Monash had also planned to bring supplies forward quickly: four carrier tanks provided rations and ammunition, and the first parachute air-drops on the western front also managed successful deliveries. His doctrine of combined arms had proved its worth: the Allies now had the tactics they needed to break through the German defenses.
But “Black Jack” Pershing was not impressed. To him, nothing was more important than establishing the American forces as an independent army, like the Belgian army or the British Expeditionary Force. Having American troops embedded in a successful attack was a step backwards in his eyes, for it allowed the argument to be made that Americans should serve under non-American, but more experienced, commanders. Pershing therefore gave orders that it would not happen again.