Original: The novel Catch-22 envisages a U.S. Army Air Corps bomber squadron based on the island during World War II, though author Joseph Heller conceded that he took some literary license in making Pianosa big enough for a major military complex.
Simplified: In the novel Catch-22, a U.S. Army Air Corps bomber squadron is based on the island during World War II, There is another, even smaller island called Pianosa off the Adriatic coast of Italy.