Delta Quadrant species that abducted about three hundred humans from Earth in 1937, Amelia Earhart among them, and took them away as slaves.
The Briori visited Earth in 1937 and carried roughly three hundred people back to the Delta Quadrant as forced labor. The humans eventually rebelled and drove the Briori off, and their former masters never returned.
In The 37's, Voyager found Earhart, her navigator Fred Noonan and six others in cryostasis on a planet where the freed slaves had settled. Their descendants had grown to more than a hundred thousand people in three cities, and at first they mistook Voyager for a returning Briori ship.