Fort Lyon National Cemetery is a United States National Cemetery located near the city of Las Animas in Bent County, Colorado.

It is administered by the Fort Logan National Cemetery in Denver County, Colorado.

Named for the first Union General to die in the Civil War, Nathaniel Lyon, the cemetery was established as part of Fort Lyon the first time in 1887.

In 1906 the fort buildings were converted into a sanitarium to treat soldiers and prisoners of war with tuberculosis, and burials began in 1907.

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