"The Oversight" by Miles J. Breuer is an old science fiction story about a group of Roman soldiers who suddenly appear in present-day Nebraska, causing confusion and battles with the locals. The story focuses on John C. Hastings, a medical student, and Celestine Newbury, who see a Roman ship on the Missouri River. As people try to understand what's happening, fights break out between the Roman soldiers and the townspeople. Hastings gets involved in dangerous missions and discovers that a Martian scientist has been watching Earth for a long time and brought the Romans there. As Hastings and his companions grapple with this information, he and his human companions must come to grips with what progress on Earth has become while contemplating the very meaning of humanity and civilization.

The Oversight
By Miles J. (Miles John) Breuer
When Roman soldiers materialize in modern Nebraska and begin warring with the locals using ancient weaponry, a medical student uncovers a Martian plot that makes him question everything he thought he knew about the Earth.
Summary
About the AuthorMiles John Breuer was an American physician and science fiction writer of Czech origin. Although he had published elsewhere since the early 20th century, he is considered the part of the first generation of writers to appear regularly in the pulp science fiction magazines, publishing his first story, "The Man with the Strange Head", in the January 1927 issue of Amazing Stories. His best known works are "The Gostak and the Doshes" (1930) and two stories written jointly with Jack Williamson, "The Girl from Mars" (1929) and The Birth of a New Republic (1931).
Miles John Breuer was an American physician and science fiction writer of Czech origin. Although he had published elsewhere since the early 20th century, he is considered the part of the first generation of writers to appear regularly in the pulp science fiction magazines, publishing his first story, "The Man with the Strange Head", in the January 1927 issue of Amazing Stories. His best known works are "The Gostak and the Doshes" (1930) and two stories written jointly with Jack Williamson, "The Girl from Mars" (1929) and The Birth of a New Republic (1931).