Five years ago, The Fire Nation attacked his village. Outnumbered, he lost the battle and was sent to a off-shore prison rig. Katara later inspired him to lead his people to successfully rebel against the Fire Nation. Tyro also participated in the Invasion of the Fire Nation, but was captured. He has now been released.
The Fire Nation attacked his village five years ago. He and the other Earthbenders were outnumbered 10 to 1, but fought bravely. When they were defeated, they were sent to an off-shore prison rig where they were imprisoned. Tyro remains a leader and inspiration to his people, even during their imprisonment.
Tyro has worked hard to keep the prisoners alive throughout their long captivity. Unwilling to engage in hopeless combat on a prison rig without earth to bend, he has not favored open rebellion. When Aang provides a source of earth and his son Haru shows a willingness to fight, however, Tyro sheds his reluctance and helps lead the fight for freedom valiantly.
Tyro was again seen in "The Day of Black Sun, Part 1: The Invasion". He was found by Hakoda and the other Southern Water Tribe men. Along with his son and other Earth and Waterbenders, he was brought to the Black Cliffs. It would seem that he and Haru did succeed in liberating their village. The small army invaded the Fire Nation during the solar eclipse. After Aang failed to defeat the Fire Lord, the submarines were destroyed and the invasion force was stranded. The younger ones, including Haru, were sent to escape with Aang while the older ones were to stay. The soldiers that were left behind, such as Tyro, were then imprisoned.
Tyro was freed from prison after the War ended, and reunites with Haru.