Its surface was mostly covered in water, but there were three continents. The planet's years were equal to about 1.5 standard years. The gravity was slightly stronger than standard, and the days were shorter than standard. The planet was also home to the Dellaltians, huge, sentient, lake dwelling reptiles. For a fee, they would ferry people and cargo across their lakes on rafts. Dellalt had two moons whose light reflected on its watery surface.
The southernmost continent was the site of Xim the Despot's vast treasure vaults, which were surrounded by an advanced city. According to legend, the treasure ship Queen of Ranroon, having escaped the Third Battle of Vontor, never arrived at Dellalt, and the vaults remained empty. However, the treasure was hidden in a different set of vaults, directly below the dummy vaults. When Xim died around 25,100 BBY, his empire crumbled, and the city regressed considerably. Defense installations, monorails, and even the water and sewage treatment plant all crumbled into ruin.
In the mountain to the east of the town, the inbred descendants of Xim's forces knew the truth about the treasure. Known as the Survivors, they maintained a thousand of Xim's still formidable war droids. In 2 BBY, the Survivors used these droids against a group of offworlders who started a semi-legal mining camp nearby.
During the Clone Wars, Dellalt was allied with the Confederacy of Independent Systems. Later during the Outer Rim Sieges of 19 BBY, a number of Jedi and clone troopers were deployed here in a confrontation against the Separatists. When Order 66 was issued, at least ten Jedi including Siadem Forte and Klossi Anno fought off their former legions to escape in a SX troop shuttle. Four Jedi were killed and several wounded in the stand-off and an attack by a Republic light cruiser and several flights of ARC-170's.
In 0 BBY, a ship from an Imperial convoy passing through the Dellalt system, named the Bixby defected to the Rebel Alliance. Its crew informed the Alliance of Operation Strike Fear, a major Imperial fleet operation intending to deliver critical blows to the Rebels by destroying their planetary presences and bludgeoning the Rebel fleet into destruction.
In 25 ABY, the Yuuzhan Vong established an outpost on the planet during their attempt to invade the Tion Hegemony. The extragalactic aliens left the native sentient species alone, though off-world travel was prohibited.