Her Majesty Queen Jadis' Secret Police, also known as the White Witch's Secret Police, was the undercover police force established by the Narnian ruler Jadis.
This Police force was created for the purposes of intimidation, reconnaissance, and spying on the oppressed Narnian citizens. They arrested any whom they viewed as traitors, including the Faun Tumnus, or those they were ordered to by Jadis.
Known members of the Secret Police include its captain, Maugrim, and some of the ever-listening trees and various other creatures, such as Vardan, who worked as spies.
With Maugrim dead at the hands of Peter during his first fight, the Secret Police lost its captain as the surviving wolves retreat. The wolves are later present during Aslan's sacrifice at the Stone Table to which during the sacrifice, Aslan gets his mane shaved as he is placed on top of the Stone Table. As the sacrifice begins, the wolves then howl as the other minions celebrate. After Aslan dies during the sacrifice, the wolves howl again as the other minions continue to celebrate, much to Lucy and Susan's sadness to Aslan who died during this tragic event.
During Jadis' plan to take over Narnia, the wolves appear participating in battle with the rest of the evil creatures part of Jadis's Army. Just as Aslan's Army charges across the battlefield and clashes with Jadis' Army, the wolves part of the Secret Police fight against Aslan's Army as a violent battle rages across Beruna. After Jadis dies during battle at the hands of Aslan, the battle ends with the Secret Police being disbanded and the Pevensies become kings and queens of Narnia.
The Secret Police surrounds the Beaver's House