He was privy to techniques, propaganda tactics and strategies of various covert groups.

It tells the story of an armed overthrow of the United States Government by a covert group of white supremacists.

He also wrote Triage (1972), a novel about a covert group dedicated to killing people it considers to be not worth having around.

The secret policy of Turkification was allegedly carried out by covert groups in order for its instigators not to be discovered.

The term usually excludes covert groups, such as intelligence agencies, or guerrilla insurgencies, which hide their activities and memberships but maintain a public presence.

The Metal Men are a covert military group, so named because they came back from every mission unscathed.

He'd taken some hits on undisclosed arms shipments around the world by a covert American group he'd almost run to ground.

"Fanatical devotees of Kahless," he had said, "who find any actions taken by a covert group to be inherently dishonorable."

Keeler secretly also leads the Ghost Soldiers, a second covert group that may or may not be working against the best interests of Section Zero.

The team is portrayed as a covert group with access to sophisticated military equipment.