Hakoda went to fight the Fire Nation before the beginning of the series , reappearing later to lead his son 's invasion in Book Three .
Much of Sokka 's ingenuity in the show is attributed to Hakoda 's teachings .
Hakoda went to fight the Fire Nation before the beginning of the series , reappearing later to lead Hakoda 's son 's invasion in Book Three .
Much of Sokka 's ingenuity in the show is attributed to Hakoda 's teachings .