Historians have proven that there is no evidence of a war taking place there like arrow heads or any bone remains.
There were 100 people and not even one body was found, all the buildings and animals were gone. Even if a drought came or the Natives attacked them there would have been remains of them like bones.
Scientists haven't been able to find anything that would have belonged to the lost colony of Roanoke. How could it be possible to not find anything from the colony if they died from a drought, or diseases.