Il volo su Vienna del 9 agosto 1918 fu una trasvolata compiuta da 11 Ansaldo S.V.A. dell'87ª Squadriglia Aeroplani, detta la Serenissima.
The Flight over Vienna was an air raid undertaken by Italian poet and nationalist patriot Gabriele D'Annunzio on 9 August 1918. With 11 Ansaldo S.V.A. from his team, the 87ma squadriglia (squadron) called La Serenissima all bearing the Lion of St Mark painted on their fuselage sides as the squadron's insignia, he flew for over 1,200 km in a roundtrip from the squadron's military airfield near San Pelagio at Due Carrare near Padua to Vienna to drop some thousands of propaganda leaflets.
The action was planned the year before but technical problems, such as the fuel capacity of the planes, delayed it.
The first trial was attempted on the 2 August 1918, but the aircraft returned due to heavy fog. The second trial, on 8 August 1918, was cancelled due to strong wind, while the last one, on 9 August, was successful.
They flew over Vienna and dropped 50,000 leaflets on a three-colored card (green, white, and red: the colors of the Italian flag). They were written by D'Annunzio himself and were not translated into German. They read:
"On this August morning, while the fourth year of your desperate convulsion comes to an end and luminously begins the year of our full power, suddenly there appears the three-color wing as an indication of the destiny that is turning.
Destiny turns. It turns towards us with an iron certainty. The hour of that Germany that thrashes you, and humiliates you, and infects you is now forever passed.
Your hour is passed. As our faith was the strongest, behold how our will prevails and will prevail until the end. The victorious combatants of Piave, the victorious combatans of Marna feel it, they know it, with an ecstasy that multiplies the impetus. But if the impetus were not enough, the number would be; and this is said for those that try fighting ten against one. The Atlantic is a path already closing, and it's an heroic path, as demonstrated by the new chasers who coloured the Ourcq with german blood.
On the wind of victory that rises from freedom's rivers, we didn't come exept for the joy of the daring, we didn't come exept to prove what we could venture and do whenever we want, in an hour of our choice.
The rumble of the young italian wing does not sound like the one of the funereal bronze, in the morning sky. Nevertheless the joyful boldness suspends between Saint Stephen and the Graben an irrevocable sentence, o Viennese.
Long live Italy!"