The Royal Afghan Air Force retained the roundels until adopting a new style in 1967, with a unique insignia consisting of a tri-color triangle using the national colors upon a white disc, on which was inscribed with Arabic lettering forming various phrases. This roundel was placed on the rudder in place of the flag. This remained in use after the overthrow of the monarchy until the Russian invasion in 1979, when a new insignia of a red disc with yellow inscriptions was adopted. This was short-lived however, as in 1983, a more Soviet-standard red star on a white disc ringed in black, red, and green was adopted. These were maintained until after the Soviet departure.