Biitu was the Biituian homeworld in the Cassandran Worlds region.
Biitu was an agriworld in the Cassander sector of the Outer Rim Territories. It was home to several species of plants, including a fruit tree that produced an orange-colored, edible fruit, and a green-stalked plant that produced a yellow, cylindrical crop. Both of these species were cultivated by the native Biituians. The planet was also home to an orange-plumed, flight-capable bird, a yellow, burrowing reptile, and the timid Biituian fen-hare. Mungo Baobab, a visitor to the planet, rode a rockhopper while scouting out on the planet's surface.
Biitu was a low-tech agriworld. During the Outer Rim Sieges of the Clone Wars, Jedi General Traavis led clone forces to war against the CIS on this planet. When Mungo Baobab discovered a valuable fuel source on Biitu, the Galactic Empire dispatched a gigantic evil droid called the "Great Heep" to capture Mungo and take control of the planet and turn it into a wasteland. With the aid of a small boy named Fidge and his pet, Chubb, the droids R2-D2 and C-3PO devised a daring scheme to free Mungo, defeat the forces of the Empire and liberate Biitu from the Great Heep. During the Galactic Civil War, the Rebel Alliance kept a small outpost on Biitu from where they could launch supply shuttles to nearby systems, since it was a planet the Galactic Empire had generally ignored after the incident with the Great Heep.
From 4 ABY to 12 ABY, the planet became part of the Pentastar Alignment until the death of Ardus Kaine. It would soon become part of the Imperial Remnant.