"The idea is to identify a few problematic jumbos in the herd and capture them," Vinod Kumar Yadav, chief conservator of forests told The Times of India. "This scares the rest in the herd and keeps them confined to the 'corridor.'"
Indian officials enter the forest to capture young Asian elephants, a method to "scare" the herd into staying away - and to get more elephants for captivity. Captors use a herd of other tamed elephants to create a kind of "living wall" and isolate them from their herd. They then use tranquilizers and then, according to Poorva Joshipura, CEO of PETA India, the calves are roped and pushed along while under sedation.
"The elephant is then confined inside a kraal [ a sturdy wooden enclosure] or tied between trees and beaten until he or she loses all hope and begins to obey," Joshipura told The Dodo. "This can take months."
There are countless videos of this "breaking" technique on the internet; you can see examples here and here - but be warned, the images may be upsetting.