Historical map shows Thailand’s territorial losses during Rattanakosin period for learning about Thai history. • Shows the territorial losses from King Rama 1-9. • Shows the name of the land related to the loss of land such as Ngiao, Xishuangbanna, Sip Song Chau Tai, Northern Laos, Southern Laos, and Khmer. • Shows the name and location of the city such as Kengtung, Chiang Rung, Puan, Terengganu, Myeik, and Kampong Cham. • Shows brief borders of kingdoms and rivers. • Colors and numbers are used to demonstrate the area and order of the territorial losses. • Information about when each territory is lost. • 2022 updated. • Size (M) 69x100 cm has a scale of 1:3,400,000, Size (XL) 100x138 cm has a scale of 1:2,400,000. • Suitable for grade 4-6 primary school students age 9-11 years old.