Department of Extranormal Operations

The Department of Extranormal Operations (DEO) is a United States Government Agency that is tasked with closely monitoring and if necessary interfering with known metahumans.

Arkham Origins Blackgate Incident
Three months after the events at Blackgate, Catwoman infiltrated and stole classified data from one of the DEO's buildings. As a result, the DEO sent a squad to hunt her down. Batman intervened trying to stop Catwoman. The DEO mistakingly assumed that he was her accomplice and targeted him as well, forcing the Dark Knight to neutralize the DEO soldiers while pursuing Catwoman.

Trivia

 * Amanda Waller in the comics was a member of the DEO, although in the Arkham series, she's a member of the Department of Justice instead.