Petar I of Serbia vs Prasat Thong

Petar I became King of Serbia in June 1903 after the assassination of Alexander I and the end of the Obrenovic dynasty. His accession restored the Karadjordjevic dynasty to the throne.

Petar I led Serbia during the First and Second Balkan Wars (1912-1913), which resulted in significant territorial expansion. Serbia gained Kosovo, Macedonia, and parts of Albania, doubling its territory.

Petar I led Serbia through World War I after the Austro-Hungarian invasion in 1914. Despite initial victories, Serbia was overrun in 1915, and the king led the army and government in exile on Corfu.

Petar I was proclaimed King of the newly formed Kingdom of Serbs, Croats, and Slovenes in December 1918. This united South Slavic peoples into a single state, later known as Yugoslavia.

Prasat Thong, a nobleman, seized the throne of Ayutthaya from King Chetthathirat. He established the Prasat Thong dynasty, which ruled Siam for the remainder of the 17th century.

Prasat Thong ordered the construction of Wat Chaiwatthanaram, a Buddhist temple in Ayutthaya. The temple was built on the site of his former residence and became a major religious monument.

Prasat Thong crushed a rebellion by Japanese mercenaries and traders in Ayutthaya. The uprising was led by Yamada Nagamasa's son, and its defeat ended Japanese influence in Siam for centuries.

Prasat Thong led a military campaign into Cambodia, capturing the capital Oudong. The campaign reasserted Siamese suzerainty over Cambodia and brought back many captives to Ayutthaya.