Roman roads is an adjective phrase. Roman is an adjective that expresses nationality and modifies roads
Military success is an adjective phrase. Military is modifying success.
The Land is set in America after the Civil War. The story takes place in the South. Many details help show this time period. First, there is tension between whites and African Americans. Not everyone can read or write. People are treated differently and cannot go to school together. People also travel using horses and wagons.
They are called "Tercet".