This fourth volume in the comprehensive series “fills a gap in the existing narrative” of WWII’s Mediterranean air war (Journal of Military History). The fourth volume in this momentous series commences with the attacks on the Italian island fortress of Pantellaria, which led to its surrender and occupation achieved almost by air attack alone. The account continues with the ultimately successful, but at times very hard fought, invasions of Sicily and southern Italy as burgeoning Allied air power, now with full US involvement, increasingly dominated the skies overhead. The successive occupations of Sardinia and Corsica are also covered in detail. This is essentially the story of the tactical air forces up to the point when Rome was occupied, just at the same time as the Normandy landings were occurring in northwest France. With regards to the long-range tactical role of the Allied heavy bombers, only the period from May to October is examined, while they remained based in North Africa, with the narrative continuing in a future volume. This volume also delves into the story of “the soldiers’ air force.” Frequently overshadowed by more immediate newsworthy events elsewhere, the soldiers’ struggle was often of an equally Homeric nature. “No future publication on the Mediterranean air war will be credible without use of this series.” —Air Power History