Borommarachathirat II
Borommarachathirat II or Borom Rachathirat II (), also known as King Samphraya () (?–1448), was a king of Ayutthaya. His reign saw its early expansions.

He was a son of Intharacha who had finally taken the Ayutthayan throne for the Suphannaphum Dynasty. He had two elder brothers: Prince Aiphraya and Prince Yiphraya; and was appointed by his father to govern Chainat ( Phitsanulok's old name).

In 1424, Intharacha died. His two brothers marched from their respective cities to Ayutthaya for the throne. They fought on elephants in single combat and both died, leaving the throne to Samphraya. In 1433 Samphraya led Siamese forces to subjugate Cambodia plundering Angkor Thom. This assault eventually caused the Khmers to abandon Angkor and to relocate their capital further south-east.

And he ordered the Nakhonin to rule in Cambodia. Later, the Nakhonin died, he appointed the Prince of Phrak, his another son to reign in Cambodia. But the prince was assassinated by Ponhea Yat. Therefore allowing Ponhea Yat to become king instead of the prince. After that, Ponhea Yat moved the capital to Chaktomuk. To escape the influence of Siam, and wanting to move the center closer to the sea to further promote maritime trade.

The conquest, however, brought in a large influx of Khmer culture and traditions into the Siamese court. For example, the high reverence of Thai kingship as a deity, known as "Devaraja", came from Cambodia.

King Sam Phraya also sought northward expansion. He married a daughter of the vassal Prince of Sukhothai, Maha Tammaraja IV, and had a son, who will grow up to be Prince Ramesuan. When the last king of Sukhothai died in 1446, his grandson inherited the kingdom, further strengthening Ayutthaya control over Sukhothai.

In 1442, Chao Sam Phraya led his armies to conquer Lanna. He managed to sack the capital Chiang Mai but was unable to conquer the kingdom.

Chao Sam Phraya died in 1448 and was succeeded by his son Prince Ramesuan as Trilokanat.
Q841364
Ayutthaya
LOC
Q888895
Intharacha
PER
None
Suphannaphum Dynasty
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Chainat
LOC
Q867579
Phitsanulok
LOC
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Cambodia
LOC
Q223665
Angkor Thom
LOC
Q888895
Nakhonin
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Q201705
Cambodia
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Q1385871
Ponhea Yat
PER
Q1850
Chaktomuk
LOC
Q2233484
Khmer culture
TIME
Q5266534
Devaraja
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Q863279
Sukhothai
LOC
Q889173
Prince Ramesuan
PER
Q1059707
Lanna
LOC
Q52028
Chiang Mai
LOC
Q889173
Trilokanat
PER
Q889067
Borommarachathirat II
PER
1424-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1424
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1433
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1446-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1446
DATE
1442-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1442
DATE
1448-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1448
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1448
NUMBER
child
child
date of death
culture