Fix Thonburi southern boundaries
Update northeastern-Siamese Mueang boundaries (2)
Update northeastern-Siamese Mueang boundaries
Update boundaries during Lao–Siamese War (1778–1779) (eastern boundaries unfinished)
Update boundaries during Siamese–Vietnamese War (1771–1773)
add boundaries for early Thonburi
update Chiang Mai boundaries under Toungoo, Konbaung, Ayutthaya
correct Lan Na southern border, change end_date to 1558 ref. Sarassawadee's work
add boundaries for Sukhothai and Ayutthaya
add boundaries for Sukhothai and Ayutthaya
draft boundaries for Sukhothai and Ayutthaya