The Baatuds are a sub-ethnic group of the Oirats. They were a large tribe of the Oirats but the Baatuds were divided into other Oirat tribes in the 16th century. Many Baatud people were killed by the Manchu army during the fall of the Zunghar Khanate (1755-1758). Today very few Baatuds live among the Oirats.
References
Baatud Wikipedia(Text) CC BY-SA