The power of the Eastern Han dynasty went into depression and steadily declined from a variety of political and economic problems after the death of Emperor He in 105 AD. A series of Han emperors ascended the throne while still youths, and "de facto" imperial power often rested with the emperors' older relatives. As these relatives occasionally were loath to give up their influence, emperors would, upon reaching maturity, be forced to rely on political alliances with senior officials and eunuchs to achieve control of the government. Political posturing and infighting between imperial relatives and eunuch officials was a constant problem in Chinese government at the time. During the reigns of Emperor Huan (r. 146–168) and Emperor Ling (r. 168–189), leading officials' dissatisfaction with the eunuchs' usurpations of power reached a peak, and many began to openly protest against them. The first and second protests met with failure, and the court eunuchs persuaded the emperor to execute many of the protesting scholars. Some local rulers seized the opportunity to exert despotic control over their lands and citizens, since many feared to speak out in the oppressive political climate. Emperors Huan and Ling's reigns were recorded as particularly dark periods of Han dynasty rule. In addition to political oppression and mismanagement, China experienced a number of natural disasters during this period, and local rebellions sprung up throughout the country.