Sidoktaya
Sidoktaya is one of the oldest ancient towns in Myanmar. It is established by Prince Yazakumar (a. Min Zaya Khittaya or Min Thiri Khittaya) in Year 460 (Myanmar Era) (about 1098 A.D.). Now it is over 900 years of age. there are many archaeological places including Si-kyek-taung Pagoda, Aung-kyar Thiri Pagoda, and Sutaungpyi Pagoda. The ancient city wall had been found buried in some places.
Military history of Myanmar
The earliest extant record of warfare in the Pyu realm is the early 9th century when the Pyu states came under constant attacks by the armies of the Kingdom of Nanzhao (from present-day Yunnan). Nanzhao had just become a major military power in the region by defeating the Tibetan Empire in 801. The Nanzhao warriors then pressed down southward into the present-day Shan Hills and into the Irrawaddy valley. Ancient city-states one by one surrendered or were overrun by the "powerful mounted archers from the north". In 832, Nanzhao destroyed the city-state of Halin, close to old Tagaung, returning again in 835 to carry off many captives. The Nanzhao cavalry is said to have swept down all the way to the Bay of Bengal despite stiff resistance.