Ambush at Shumari

In 1 ABY, an Ambush occurred on the planet Shumari by a Tusken Raider on Darth Vader, intending to avenge his Tusken group that was wiped out by Vader, then known as Anakin Skywalker, on 22 BBY.

Prelude
In 22 BBY, Anakin Skywalker, then a Jedi Padawan, had left for Tatooine after he received nightmares of his mother, Shmi Skywalker, dying. After tracking his mother down to a Tusken Raider village when he learned that Shmi, then taking the name of Shmi Skywalker Lars after marrying Cliegg Lars, had been abducted by the Tuskens after they mistook her for a witch, he attempted to rescue her. When she died in his arms, Skywalker took vengeance on the village and wiped out all but one of its inhabitants. The sole survivor would hunt Vader down for some time.

The Ambush
When Vader arrived at Sundari, he was ambushed by the Raider, who also utilized a modified gaddarfi stick as his lightsaber. Although the Raider had managed to severely damage Vader and nearly killed him, the Raider ultimately ended up killed.

Behind the scenes
The ambush first appeared in the manga Perfect Evil, where Vader took his mortally wounded apprentice, Tao, to his homeworld to be buried. Although the events of the manga were declared non-canon, the duel itself was briefly alluded to in the August 26, 2013 blog series Barely Tolerable: Alien Henchmen of the Empire, under the entry for KkH'Oar'Rrhr.

Appearances

 * Perfect Evil