Aleen was a rocky planet located in the galaxy's Mid Rim. It was home to the surface-dwelling Aleena species,

and a tree-like Kindalos.

In their history, the two species clashed which almost resulted in the destruction of all sentient life on the planet.

In the Clone Wars, Aleen suffered heavy earth quakes, this led to a dispatch of the 104th battalion, AKA the Wolf pack.