During the 18th century Rattanakosin Period. After sporadic fighting at the beginning of the period, the country gradually returned to normal. It is only natural that many of the early Rattanakosin works should deal with war and military strategy. Some examples are "Nirat Rop Phama Thi Tha Din Daeng", "Phleng Yao Rop Phama Thi Nakhon Si Thammarat".In the performing arts, perhaps the most important dramatic achievement is the complete work of "Ramakian" by King Rama I. In addition, There were also verse recitals with musical accompaniment, such as Mahori telling the story of "Kaki", Sepha relating the story of "Khun Chang Khun Phaen". Other recitals include Sri Thanonchai. The most important Thai poet in this period was Sunthorn Phu (สุนทรภู่) (1786–1855), widely known as "the bard of Rattanakosin" (). Sunthorn Phu is best known for his epic poem "Phra Aphai Mani" (), which he started in 1822 (while in jail) and finished in 1844. "Phra Aphai Mani" is a versified fantasy-adventure novel, a genre of Siamese literature known as "nithan kham klon" ().