Short answers, pulled from the story.
King Rama I was born on the 20th of March 1737 to Thongdi and Daoreung. His father served as a nobleman in the royal court of Ayutthaya while his mother was the eldest daughter of a wealthy Hokkien Chinese magnate named Yok.
King Rama I established the Chakri dynasty and moved the capital to Rattanakosin on the 6th of April 1782. He relocated the seat of government across the Chao Phraya river from Thonburi to create a new political center protected by waterways.
King Rama I fathered forty-two children including ten born to Queen Amarinda before he died on the 7th of September 1809. Prince Isarasundhorn succeeded him as Phutthaloetla Naphalai known today as Rama II.
The Burmese Siamese War broke out between 1785 and 1786 and is locally known as the Nine Armies War because nine armies attacked simultaneously. King Bodawpaya of Burma launched these campaigns to expand dominions over Siam while Siamese forces defended key positions like Lampang and Phuket.
The court assembled surviving legal texts into a comprehensive compilation known as Three Seals Law in 1805. This code named for official seals used to authenticate volumes remained central reference point for traditional systems into modern reform era.