Mossaddeq was replaced by Fazlollah Zahedi, but Mossaddeq refused to step down. A military dictatorship was put in place. Shah Pahlavi was put back in power. (Pahlavi was in power before this, but he was forced to put Mossadeq back in power at the time.) This made the people angry. They would later start the Iranian Revolution in 1979. The revolution put the Ayatollah Khomeini in power.