false flag

[ fawls flag ]
/ ˈfɔls ˈflæg /

noun

an attack or other hostile action that obscures the identity of the participants carrying out the action while implicating another group or nation as the perpetrator (often used attributively): Evidence suggests that the covert operation was a false flag.The false flag terrorist attack lured the military into a hasty response.

Origin of false flag

First recorded in 1800–10
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019