Corsair top view, with its all-around Navy blue camouflage, the blue roundel in the national insignia was not painted. Hence, insignia consisted of Star and white-red Bars. US modified its national insignia multiple times since 1940. When US entered WW2 in 1941, original national marking had a blue roundel, white star, with concentric red dot in star's center.

Unfortunately, due to visual perception and color wavelength pattern, red color shows up more stronger than others in the color spectrum. Hence, from 500 yards out, some US pilots mistaken their own planes to be enemy Japanese aircrafts, resulting in friendly-fire incidents. In 1942, US issued a general order to remove the red dot from all national insignia. In 1943, white bars on were added to the national roundel, followed by another regulation to add a red outline around the entire insignia, this restored the Red-White-Blue combination in the marking. In 1949, new regulation placed red bars within larger white bars. This is the standard national marking used up to the present day.

Rollover : Corsair underside, showing twin extra fuel tanks and large Marine service branch marking. During Chosin Reservoir battles, Marine squadrons offered close air support to retreating Marine ground troops, which were outnumbered 8-to-1 as advancing Chinese Communist overran some Marine strong points by sheer numbers. Large MARINES marking offer quick air-ground identification and prevent friend-fire incidents.

In 1963, Marine fighter squadron VMF-323 was redesignated into VMF(AW)-323, with AW referring to All Weather operations when outfitted with F8U-2 Crusader jets. By 1964, a new designation of Marine fighter attack squadron VMFA-323 was bestowed as the unit flew F-4B Phantom II jets. The Attack title indicates its close ground support role.