Actually, subby may have gotten it partially right.From the Star Wars Wiki:"A few months after the Battle of Yavin, the Empire launched a number of small raids at the Yavin moon, in an attempt to destroy the Core Group of the Rebellion.These raids were carried out by small TIE squadrons launched from a small base near the Yavin system. They often maintained reconnaissance patrols rather than retaliatory attacks. The Rebel Alliance still had to evacuate Yavin 4 to escape retaliation from the Imperial Starfleet and eventually settled on Hoth. The last raid carried out by the Empire was a crushing assault consisting of a planetary blockade along with the remnants of the 501st Legion, TIE Fighters and AT-STs. General Jan Dodonna, mastermind of Yavin's defense, was not able to escape and was captured by Imperial forces and later imprisoned.The newly launched Executor was dispatched to destroy the Rebel fleet. But Admiral Griff's squadron of Star Destroyers came out of lightspeed and collided with the Executor. By the time the crew regained control, the last Rebel ship jumped into hyperspace."So yes, Tie fighters did in fact attack the base on Yavin IV during the blockade of the Yavin system, but the Empire didn't win the battle, as the rebels eventually escaped.Nerds can find more info here (new window)Also,
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