Around 91 ASC, Kahchi and the other members of the Rough Rhinos attacked a small Earth Kingdom town inhabited by Jet and his parents, the latter of whom were killed in the raid. As a result of his parent's death, Jet would later go on to form a rebel group named the Freedom Fighters.
During the spring of 100 ASC, Team Avatar was camping out in the southwestern Earth Kingdom when Kahchi and the Rough Rhinos ambushed them. However, the friends managed to ward the military group off and escape.
Not too long after the incident, the Rough Rhinos raided the Earth Kingdom's Chin Village in honor of Fire LordOzai. In an attempt to scare the village, Kahchi used his weapon to destroy the statue of the village's founder, Chin the Great. Team Avatar was there by coincidence, since Aang had just undergone a trial for killing Chin in his past life as AvatarKyoshi and was found guilty by the town's mayor when Kyoshi confessed to the crime. When Aang, still dressed in Kyoshi's clothes, approached Kahchi, the latter readied his guan dao. Aang leaned forward and extended his arms out behind him, holding one of Kyoshi's fans, which he opened as he ran. He spun aside out of the rhino's way at the last moment and used the fan to airbend Kahchi out of his saddle over the cliff.
Later that spring, the Rough Rhinos ran into Iroh and Zuko. Ogodei swung his ball and chain at Iroh, but Iroh kicked the ball away, redirecting it and wrapping its chain around the leg of Kahchi's rhino. Iroh rose back up and swatted the rump of the rhino that had been chained. The rhino ran off, yanking Ogodei and Kahchi away. Iroh then waved as he watched them both go.