This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
YuetMeng . en Map of the First Mongolian Invasion of Vietnam zh own zh user Betoseha The map shows the north vietnam region during the First Mongolian Invasion of Vietnam Maps of the Trn Dynasty Maps of the Mongol Empire
Page 2023 Free-images.com. All images are Public Domain