# Red flag

Red flag may refer to:

## Signs and warnings

* Red flag (idiom), a literal or metaphorical warning
* Red flag (American slavery), signal of an upcoming slave sale
* Red flag warning, issued by the National Weather Service in the United States
* Bloody flag, maritime flag signaling an intention to give battle with no quarter (fight to the death)
* Red flag in motor racing, when conditions are too dangerous to continue the session
* Red flag in gridiron football
* Red flag used by a railway conductor

## Politics

* Red flag (politics), predominantly a symbol of left-wing ideologies
** Red Banner, a symbol of revolutionary struggle used in Russia and the Soviet Union
** Flag of the Soviet Union, known as the Red Banner
* Red Flag Party, a communist party in Venezuela
* Peruvian Communist Party (Marxist–Leninist), originally Peruvian Communist Party – Red Flag
* Communist Organization of Spain (Red Flag)
* Communist Party (Burma), or Red Flag Communist Party
* Communist Party of India (Marxist–Leninist) Red Flag
* Marxist-Leninist Party of India (Red Flag)

## Law

* Red flag law, a state law in the US that allows temporary confiscation of firearms
* Red flag traffic laws, in the UK and US in the 19th century affecting drivers of early automobiles
** "Red Flag Act", a Locomotive Act, the 19th-century British road law
* Red Flags Rule, to help prevent identity theft in the US

## Arts, entertainment and media
### Film and television

* Red Flag, a 2012 film starring Alex Karpovsky
* Red Flag: The Ultimate Game, a 1981 TV film starring Barry Bostwick
* "Red Flag", an episode of Jericho
* Red Flag, fictional group in Alphas
* "Red Flag", an episode of the TV documentary series People's Century

### Literature

* Red Flag (magazine), published by the Chinese Communist Party
* Red Flag (newspaper), by the Trotskyist organisation Socialist Alternative in Australia
* Shimbun Akahata ('Newspaper Red Flag'), of the Japanese Communist Party
* Bandera Roja (La Paz), a socialist newspaper in Bolivia of the 1920s
* Die Rote Fahne ('The Red Flag'), a German communist newspaper created on 9 November 1918 by Karl Liebknecht and Rosa Luxemburg

### Music

* Red Flag (band), a synthpop band founded in 1984
* Red Flag (album), by All Saints, 2016
* "The Red Flag", a socialist song
* "Bandiera Rossa" ('Red Flag'), a famous song of the Italian labour movement
* "The Standard of Revolt" (French: Le drapeau rouge 'the red flag'), a French socialist song
* "Red Flag" (song), by Billy Talent, 2006
* "Red Flags" (song), by Mimi Webb, 2023
* "Red Flags", a 2023 song by Josh Ross
* "Red Flags", a 2023 song by Plain White T's
* "Red Flag", a song by Slipknot from the 2019 album We Are Not Your Kind
* "Red Flag", a song by Gwen Stefani from the 2016 album This Is What the Truth Feels Like
* "Red Flag Day", a song by U2 from the 2017 album Songs of Experience

## Other uses

* Red Flag AB, a company based in Stockholm and Malta
* Red Flag Group, a compliance risk firm in Hong Kong
* Red Flag Linux, software
* Red Flag Publishing House, a book publisher based in China
* Exercise Red Flag, a series of United States Air Force training exercises
** Red Flag – Alaska
* Red Flag, several classes of locomotives by Kim Chong-t'ae Electric Locomotive Works, in North Korea
* Charles E. Taylor (politician), known as "Red Flag" Taylor, an American politician