During the Chubbits' valiant resistance against the Imperial occupation of their homeworld, Aridus, a group of them laid in wait and surprised an Imperial hover-train that was traveling across the desert. Despite their efforts, the Chubbits found themselves at a disadvantage. Luckily, the Human Rebel Alliance champion Luke Skywalker, along with his protocol droid, C-3PO, happened to observe the unfolding ambush. Skywalker and the droid then stepped in to aid the Chubbits, launching bags filled with proton grenades at the train and obliterating it.