S1E11 · Book One: Water - Chapter Eleven: The Great Divide

Complete story — includes the ending

The group ventures into the Great Divide, the world's largest canyon. Katara and Sokka start bickering, so Aang decides to put his diplomatic skills to the test, as the Avatar is supposed to be a conciliator and promoter of peace. He successfully solves their minor disputes, but Aang's skills are soon put to a more substantial test when two Earth Kingdom tribes, the Zhang and the Gan-Jin, who have been in a feud for over a hundred years, are forced to cross the canyon together en route to Ba Sing Se. The Gan-Jin believe that their ancient leader was robbed by the ancient Zhang leader, while the Zhang believe their leader was only trying to help and was falsely imprisoned. The tribes are guided by an earthbender guide across the vast, dry landscape. Along the way, they are hunted down by large native predators called canyon crawlers. In the end, Aang is able to end the feud by lying that their legends are based on a children's ball game and that their leaders were twin brothers. The two tribes travel together with the guide to the famous capital city of the Earth Kingdom, Ba Sing Se.