People vanish all the time. They disappear while on their own or sometime within sight of their friends. You’d think the best way to not vanish would be to stay in a group. Safety in numbers. Or maybe not. In 110 AD something like 6,000 men, all their equipment and the camp followers all marched north into Scotland. There is no record of what happened to them after that. 6,000 men is a lot of bodies to just make vanish. And all the equipment. There should be some record somewhere saying what became of the ninth but there is nothing. Shortly after the ninth disappeared into what is now known as Scotland, Emperor Hadrian had the Roman Army build a wall across the island to keep those crazy people away from the folks living in the south.
The Norfolks were a military unit from England. They were shipped to the Mediterranean to fight the Turks during World War I. The Norfolk Regiment was made up of 16 officers and 250 men led by Sir Horace Proctor-Beauchamp. The entire unit vanished. No one knows where they are even today.
In 1922 the folks living in Hoer Verde where living their lives like anyone living in Brazil. They had a town of 600 people, along with a church, school and market place. In 1823 everything changed. A visitor to the village discovered the people were all gone. It looked as if everyone had just walked out of town without bothering to take personal possessions or leave behind any clue as to why they left or where they were going.
Here are a few stories of mass disappearances.