Back in the day japan started it in 1980
Stage 1: Slave ships from Britain to west Africa carrying Cloth, Guns, and drink which are then traded for men, women, and children.
Stage 2: The slaves are traded for said goods and those who did not comply would be shot.
Stage 3: Slaves would be sold to the highest bidder.
Bag check and shoe check and Having to go through a metal detector and being very precautious that it won't happen also the piolet locking the door so no one is able to get in
Hades. Besides being an immortal god, one of his special powers was invisibility. His Helm of Darkness that allowed him to become invisible. His helmet assisted the hero Perseus to help him defeat the monster Medusa.
Hope it helps! :)