Battle of Turkana

Battle of Turkana occured above Turkana, when TIE interceptors detected a Rebel fleet in orbit of the planet, and a fleet of Star Destroyers moved to exterminate. The Imperials where surprised by the sudden appearance of a new fighter, the X-Wing.

After that event, the Alliance proceeded to the manufacturing of the A-Wing. On the other hand, the Emperor responded with the Operation Strike Fear which tormented the Rebellion for some time.

Appearanes
Star Wars: X-Wing (intro)