Commanded by Commandant Secrétan, the GBM I/19 went on to Sardinia, which was in the hands of the Allies, on May 15 and conducted the first war mission one month later, by attacking communication routes in the region of La Spezia, in Italy. Sorties accordingly commenced, while targeting bridges, railways, train stations, and various routes situated on the Italian Peninsula. Sorties took place all along the months of June and July before orienting, as of August, on the midi of France in prevision to the disembarking in Provence. The first mission on the metropolitan territory was accomplished on the 2 of the same month, and during the second mission, on August 4 and 15, the B-26 of Gascogne engaged at the connecting bridge of Sisteron. Accordingly, then, the activity of the I/19 was shared between France and Italy.