Ivan V of Russia vs Mahinthrathirat

Ivan V was crowned as co-tsar of Russia alongside his half-brother Peter I, following the Moscow Uprising of 1682. Due to his physical and mental disabilities, Ivan was a figurehead ruler, with real power exercised by his sister Sophia Alekseyevna as regent.

Ivan V continued as nominal co-tsar while his sister Sophia Alekseyevna ruled as regent from 1682 to 1689. He played no active role in governance, with all decisions made by Sophia and her advisors, including Prince Vasily Golitsyn.

After Peter I overthrew Sophia's regency, Ivan V remained co-tsar, though he continued to have no real power. He lived quietly in the Kremlin, deferring to Peter, until his death in 1696, after which Peter became sole ruler.

Mahinthrathirat formed an alliance with King Setthathirath of Lan Xang (Laos) to resist Burmese aggression. The alliance provided temporary military support, but coordination failures and Setthathirath's withdrawal weakened the coalition, leaving Ayutthaya isolated against the Burmese invasion.

Mahinthrathirat commanded the defense of Ayutthaya during the Burmese siege, but internal divisions and betrayal by some nobles led to the city's capture. The failure to hold the capital resulted in the kingdom's collapse and Mahinthrathirat's own capture and death.

Mahinthrathirat was captured and executed by the Burmese king Bayinnaung after the fall of Ayutthaya. His death ended the Suphannaphum dynasty, which had ruled Ayutthaya since its founding by Intharacha. The execution marked the complete subjugation of Ayutthaya under Burmese control.