Naval Air Station Jacksonville is a military airport, eight miles south of the central business district of Jacksonville, Florida, United States. NAS Jacksonville and Naval Station Mayport are the two naval bases in Duval County.HistoryDuring World War I, the area now occupied by NAS Jacksonville, often referred to colloquially as "NAS Jax", was named Camp Joseph E. Johnston, and was commissioned on October 15, 1917. The United States Army trained quartermasters and the center included more than 600 buildings; by 1918 Camp Johnston was the largest of all Quartermaster mobilization and training camps. The second largest rifle range in the U.S. was constructed there, but the camp was decommissioned on May 16, 1919. The Florida National Guard began using the site in 1928 and it was renamed Camp J. Clifford R. Foster. In 1939 a group of 10 ex service men traveled to Washington at their own expense to talk the Navy, who was looking for a new base, to come and look at the old National Guard base, they did and liked what they saw. Most of their names are lost to history. Only two are known: Charles Bennett and Ira Lane.On October 15, 1940, Naval Air Station Jacksonville was officially commissioned, and became the first part of the Jacksonville Navy complex that would eventually include NAS Cecil Field and Naval Station Mayport, as well as numerous naval auxiliary air stations and outlying fields in northeast Florida. On the same date, Captain Charles P. Mason, USN, raised his command pennant as the station's first commanding officer.