A struggle for succession in the mid-twelfth century gave the Fujiwara an opportunity to regain their former power. Fujiwara no Yorinaga sided with the retired emperor in a violent battle in 1156 against the heir apparent, who was supported by the <answer>Taira and Minamoto</answer> (Hōgen Rebellion). In the end, the Fujiwara were destroyed, the old system of government supplanted, and the insei system left powerless as bushi took control of court affairs, marking a turning point in Japanese history. In 1159, the <answer>Taira and Minamoto</answer> clashed (Heiji Rebellion), and a twenty-year period of Taira ascendancy began.
What clans fought during the Heiji Rebellion?
Taira and Minamoto