Roderic vs Zhu Youjian

Roderic's claim to the throne was contested by Achila, son of Wittiza, who controlled the northeastern part of the kingdom. This civil war divided Visigothic forces and resources, contributing to the kingdom's inability to effectively resist the Muslim invasion in 711.

Roderic became king of the Visigoths after the death of King Wittiza. His accession was disputed by Wittiza's family, leading to a civil war. This internal division weakened the Visigothic Kingdom and made it vulnerable to external threats.

Roderic led the Visigothic army against an invading Muslim force under Tariq ibn Ziyad at the Battle of Guadalete. The Visigoths were decisively defeated, and Roderic was killed in the battle. This defeat marked the end of the Visigothic Kingdom and the beginning of Muslim rule in Hispania.

Zhu Youjian became the Chongzhen Emperor at age 16 after the death of his brother. He inherited a dynasty plagued by fiscal crisis, peasant rebellions, and Manchu threats, and he attempted to reform the government but faced insurmountable challenges.

Chongzhen ordered the execution of the powerful eunuch Wei Zhongxian, who had dominated the previous reign. This purge aimed to restore imperial authority but alienated the eunuch faction and destabilized the court.

As Li Zicheng's rebel army approached Beijing, Chongzhen refused to flee. He hanged himself on Jingshan Hill, ending the Ming dynasty. His death marked the dynasty's collapse and the beginning of the Qing conquest of China.

Chongzhen rejected Li Zicheng's offers of a negotiated settlement, insisting on unconditional surrender. This decision eliminated the possibility of a peaceful transition and led to the violent sack of Beijing.