A plot consultation reveals a historical novel with an exciting external dramatic action plot that was bogged down in historical facts and details.
Rule of Thumb
Use only the historical facts and details that serve to deepen and inform the story itself ~ meaning:
- Dramatic action plot
- Character emotional development
- Thematic significance
However, if you find yourself wanting to add those titillating tidbits because they are fascinating to you and thus, you reason, the reader will find them fascinating, too ~ wrong.
Whether a novel, short story, or screenplay, the story itself is all that matters. Even one unrelated or distantly related historical fact can dilute the story overall and will often confuse the reader.
Don't use historical facts because you can. Use what will enhance the story.