Piccio had his fighter squadrons massed against the final Austro-Hungarian offensive in June 1918. They gained immediate air supremacy over the "Luftfahrtruppen"; the Austro-Hungarians called this dismal time the "Black Weeks" for good reason. They lost 22 percent of their pilots, 19 percent of their observers, and an appalling 41 percent of their aircraft between 15 and 24 June 1918. For all practical purposes, it was the effective end of the Austro-Hungarian air arm. The invaders' infantry now faced bombing and strafing from the air whenever there was flying weather.