Colonel Kumar Lama, 46, who is currently employed as a UN peacekeeper, is accused of committing the alleged crimes in Nepal during the country's civil war in 2005. He was arrested at his home in East Sussex on Thursday.
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He faces trial in Britain under a law that allows prosecution of alleged war criminals.
Lama spoke only to confirm his identity at the hearing, where he was charged with intentionally inflicting "severe pain or suffering" as a public official on two separate individuals. He will appear at the Old Bailey in London on January 24.