History is simply a record of events that happened. An alleged supernatural historical event cannot be discriminated against in regard to an alleged non-supernatural historical event. Both events are historical. If an event was observed and recorded, it is historical. The fact that an event is non-repeatable does not discount it's historical accuracy.

The sinking of the Titanic is probably non-repeatable. The fact that it is non-repeatable does not detract from it's historical accuracy. When the Titanic was built, it was designed by some of the world's most experienced engineers, and used some of the most advanced technologies available. Many believed it would take a miraculous combination of events to sink the Titanic, yet it did.

The Bible is recorded history. People experienced events and wrote them down. The fact that supernatural events occurred has no bearing on the Bible's historical accuracy.