Yet with a sudden attack at dawn of September 16, 1918, Italian infantry rushed the whole of this barrier system and captured nearly 350 prisoners. The fighting was severe, but short, in the dark ravine, and the Italians' victory was aided by their aeroplanes, which dived one after another into that gap between the high mountains, dropping bombs and emptying drums of machine-gun bullets upon the Austrian garrison below. Shortly afterward another sector close at hand, to the north of Mount Grappa broke into activity. A series of little raids and rushes were carried out there to improve the line in several places. At once, here too, the Italians made good their intentions, and took over 300 prisoners and a number of machine guns. Along the whole front there were artillery actions of a harassing nature during September 10, 1918. Italian batteries caused fires at Melette, in the Asiago Plateau region and blew up an ammunition dump near Grisolera, on the lower Piave River. Attempts of hostile assault parties failed in front of the Italian lines south of Mori, at Mont Corno, and Val Arsa, to the north of Grappa and east of Salettuol. On the other hand, Italian reconnoitering parties attacked and drove back in the Ledro Valley a small observation post of the enemy, who left dead and prisoners. Ammunition and various material were brought back from reconnoissances at Tonaleselle and on the islets in the Piave in the Montello region. One hostile aeroplane was brought down. West of Feeri, and in the valley of Jenioa, there were patrol encounters with the capture of some prisoners by the Italians. Among the Allied troops fighting with the Italians was a Czecho-Slovak unit. On September 21, 1918, an action occurred between these troops and German and Hungarian forces on the Trentino front. It was the first in Italy in which the Czecho-Slovaks operated as a unit in their regular formation. The enemy launched the attack, prepared with greatest secrecy, east of Lake Garda. It appeared from the dispatches that the Germans and Magyars had no definite territorial objective, but planned the stroke in the hope of gaining support for the Austrian claim that the Czecho-Slovaks would give way voluntarily when faced by the army of the country that so long had held them in subjugation. It was believed in Rome and by officials of the Czecho-Slovak Headquarters in Washington that if the Austrians had achieved even a local success they would, after executing as traitors any Czecho-Slovaks taken prisoners, have again affirmed that the Czecho-Slovaks did not wish to fight against Austria.