The chi blocker training camp was a secret Equalist camp for the training of chi blocking. It was hidden in a secret cellar underneath a bookstore, and it was invaded by Tarrlok, Korra and the rest of the task force. Several people who had been participating in Equalist activities until that point were captured by the task force or the police and arrested.
At some point, the Equalists began setting up a training camp for chi blockers underneath a bookstore in the Dragon Flats Borough.
During 170 ASC, after the Revelation, Tarrlok created a task force to fight back against the Equalists. After recruiting Avatar Korra to his task force, Tarrlok planned a raid against this facility as the his team's first attack.
The task force pumped water through the walls, and froze the nearest chi blocker trainees in sight. Other Equalists attempted to flee the camp through a system of tunnels, but were pursued and eventually captured by Avatar Korra and Tarrlok. All Equalists that had been captured on the scene were then arrested in the presence of the media.
The camp was located underneath a bookstore in the Dragon Flats borough, and the bookstore was easily accessible to any near it. The walls of the bookstore were made from brownish bricks, and there were vents near the bottom that brought air into the cellar. The cellar's walls were tan and covered in large Equalist posters, including one of Amon, and the floor was made of gray tiles. The interior of the facility connected to a large tunnel, which had a dirt floor, and stone walls that were held up by wooden planks.