Matthew's sudden disappearance was caused by an unknown event or circumstance that affected him.
Joseph's sudden disappearance was caused by his abduction by unknown individuals.
What has led to the disappearance of barriers created by distance in the modern era?
There are various opinions as to what happened to the Indus valley civilization. Probably them most held is that climate change (disappearance of the monsoons) resulted in a migration to the east but in smaller more isolated towns.
it has led to the disappearance of some important species,
The removal of federal troops from southern states
Zombie Apocalypse 1607! Nom Nom Nom
Japan
We don't know. That's what makes it a "disappearance" and not a "failed colony"
Daily life at Roanoke was challenging due to limited resources, conflicts with Native American tribes, and harsh environmental conditions. The colonists faced food shortages, diseases, and harsh weather. Additionally, the sudden disappearance of the colony has led to it being known as the "Lost Colony."
The sudden loss of power led to the helicopter's freefall.
Matthew Perry the commodore for the United States Navy
The tragedy that led to the creation of the HALO SleepSack was the sudden death of Bill Schmid's daughter. Bill Schmid invented the HALO SleepSack to prevent Sudden Infant Death Syndrome.