Sadasiva Raya vs Zhu Yihai

Sadasiva Raya was placed on the throne by the regent Rama Raya, who effectively controlled the empire. Sadasiva was a figurehead, with real power exercised by Rama Raya and his family for the duration of his reign.

The Vijayanagara army, nominally under Sadasiva Raya but commanded by Rama Raya, was decisively defeated by the Deccan Sultanates at Talikota. The defeat led to the sack of Vijayanagara city and the collapse of the empire's power.

Following the Battle of Talikota, Sadasiva Raya fled the capital along with the royal family as the city was sacked by the Deccan armies. He took refuge in Penukonda, marking the end of Vijayanagara as a major power.

After the fall of Nanjing, Zhu Yihai, the Prince of Lu, declared himself regent in Zhejiang. He established a court in Shaoxing and attempted to rally Ming loyalists against the Qing advance.

Zhu Yihai's regency clashed with the claim of Zhu Yujian, the Longwu Emperor, in Fujian. The two rival Southern Ming courts refused to cooperate, weakening the resistance against the Qing.

Qing forces captured Shaoxing, forcing Zhu Yihai to flee by sea to Zhoushan Island. He continued to resist from the island with a small fleet, but his power was greatly diminished.

Zhu Yihai died on Taiwan after fleeing there following the fall of Zhoushan. He had sought refuge with Koxinga's forces, but his political influence had ended years earlier.