Sicily is the largest island in the Mediterranean Sea. It is an autonomous region of Italy, in Southern Italy along with surrounding minor islands.
World War II
John Garrett was assigned on an undercover mission in Sicily, getting involved in a gunfire without backup from the Sicilian team. Garrett dropped through a skylight and shot every enemy, running out of ammo before killing the final opponent. Garrett used a flare gun as an improvised weapon, surprising the enemy once the flare hit his chest.
Over the years, this mission became one of the stories that Garrett usually told about his field missions. Phil Coulson, who was also present during the whole mission, told him that it didn't occured as Garrett told, as Garrett changed some of the events to make a better story.