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Red triangle (badge)

Red triangle (badge) is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Red triangle (badge) rather than just read about it. In short: The red triangle, also known as the red wedge, was a required badge worn by left-wing dissidents incarcerated in Nazi concentration camps during World War Two. The red triangle patch pointing upwards designated prisoners within the jurisdiction of the Wehrmacht, including prisoners of war, spies, and military deserters.

Red triangle (badge) — main illustration
Red triangle (badge) — illustration

Key takeaways

  • Red triangle (badge) belongs to science; place it in that map before memorising details.
  • Learn the definition first, then one example that makes the definition concrete.
  • Connect Red triangle (badge) to a quantity you can measure, compute or draw — that is where exam questions come from.
  • Reproduce the core statement of Red triangle (badge) from memory before moving on to harder problems.

Reference excerpt

The red triangle, also known as the red wedge, was a required badge worn by left-wing dissidents incarcerated in Nazi concentration camps during World War Two. The red triangle patch pointing upwards designated prisoners within the jurisdiction of the Wehrmacht, including prisoners of war, spies, and military deserters. An inverted red triangle was worn by political prisoners, including resistance fighters. The political ideologies designated by the red triangle included communists, liberals, anarchists, Social Democrats, and Freemasons. After the war, the inverted red triangle symbol was reclaimed by anti-fascists in Europe, similar to the way that the pink triangle used to mark gay prisoners became a symbol of LGBTQ pride. The reclaimed red triangle symbol has been used as the logo for the Association of Persecutees of the Nazi Regime – Federation of Antifascists in Germany and numerous other post-war remembrances and memorial groups. It has also been worn as a lapel pin by left-wing politicians from Belgium, France, and Spain. Other left-wing, anti-fascist, and resistance groups have used red triangle or red wedge symbols that reference images and symbols from before WWII. One of these is Beat the Whites with the Red Wedge, a 1919 propaganda poster by El Lissitzky. An earlier image recalled by some labour movements is an equilateral triangle representing eight-hours of work, eight-hours of leisure, and eight hours of sleep in a 24-hour day. In 2020, Donald Trump's presidential re-election campaign attracted controversy by using the symbol in social media advertisements attacking his far-left opponents, whom he described as "Antifa."

Before Nazi Germany

Eight-hour workday

The red triangle has been a left-wing political symbol since the 19th century. On Labor Day in 1890 in France workers wore a red triangle as a symbol of the eight-hour working day they were fighting for, with the three points representing 8 hours of work, 8 hours of rest, and 8 hours of leisure. It is still used with this meaning in some parts of Europe, in conjunction with Labour Day celebrations on 8 May. In July 1889 in Paris, at the meeting of the Second International, the workers' association bringing together European socialist and workers' parties, decided that the following year, workers would demonstrate on May 1 to demand the eight-hour day. The red leather triangle was adopted on 1 May 1890 in Paris during the workers' struggles so that the demonstrator could distinguish himself from the man in the street. The badge symbolizes workers' demand for a maximum eight-hour work day, which reserved 8 hours of sleep and 8 hours of leisure. The inscription "1 May, 8 hours of work" was sewn onto the triangle for the demonstration. Following the immense success of the mobilization of the 1 May 1890 – in Belgium, 150,000 workers went on strike – it was decided shortly afterward to make this date a worldwide day of action, this is the creation of the International Workers' Day (French: Journée internationale des travailleurs). The eight-hour day was obtained in 1919 in France and in 1921 in Belgium.

El Lissitzky's Red Wedge

Similar symbols were being used in far-left politics in early 20th century Russia. A red triangle or "red wedge" features on some early communist posters. A red wedge appeared in a 1919 soviet propaganda poster by constructivist artist El Lissitzky titled "Beat the Whites with the Red Wedge", referring to the anti-communist White movement, who were defeated by the Red Army during the Russian Civil War. The term "whites" referred to the White movement, a conservative, right-wing, monarchist movement whose factional colour was white. The title, allegedly recommended by Ilya Ehrenburg, is possibly a response to the pogrom slogan "Beat the Jews!" (Russian: Бей жидов!, romanized: Bej zhidov!). The full slogan was Beat the Jews – save Russia! (Russian: Бей жидов — спасай Россию!), and it was predominantly used by right wing monarchists and their militant Black Hundreds. Numerous modern left-wing groups and publications have used symbols that reference the red wedge, or the reclamation or the red triangle badge that the Nazis used to mark their political opponents, or both. The black flag used by modern anti-fascists (Antifa) also refers back to the era of the Russian Revolution. The El Lissitzky poster was the namesake of the 1980s British left-wing musical collective Red Wedge, they opposed British conservatives but did not describe themselves as communist.

Opponents of the Nazi Party

Background to Nazi persecution of left-wing opponents

The colour of the symbol comes from the party colours of the Communist Party of Germany, one of the first groups to be detained in the Nazi concentration camps. Nazi crackdowns on their left wing political enemies started very early. As depicted in the famous poem, First They Came by Martin Niemöller, a German priest. It begins, "When the Nazis came for the communists, I kept quiet; I wasn't a communist" (German: Als die Nazis die Kommunisten holten). The most common English version begins, "First they came for the Communists". In a 2024 article about the origins of the red triangle symbol, Germany's public broadcaster Deutsche Welle reported, "At first, the majority of political inmates were German Social Democrats or Communists and the red of the triangle referred to their party colors.. most were non-Germans from across the political spectrum who had opposed National Socialism or Nazi Germany's occupation of their countries".

The red triangle badge in Nazi concentration camps

… excerpt ends here. Continue reading the full article.

Illustrations

Red triangle (badge) illustration
Red triangle (badge) illustration
Red triangle (badge) illustration
Red triangle (badge) illustration
Red triangle (badge) illustration

Worked examples

Example 1 — a first encounter with Red triangle (badge)

Start with the simplest possible case. Write down what Red triangle (badge) claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Red triangle (badge) before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Red triangle (badge) ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Red triangle (badge)

In research
Red triangle (badge) appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry
Engineering practice reuses Red triangle (badge) in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom
Red triangle (badge) is common in secondary-school and first-year university syllabi. It links to neighbouring topics Anarchism in Germany, Anti-fascism, Communism in Germany, so understanding it makes those chapters shorter.
In everyday life
Look for Red triangle (badge) outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.
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How to study Red triangle (badge) in 20 minutes

  1. Read the reference excerpt below once, without taking notes.
  2. Close the page and write down what Red triangle (badge) means in your own words.
  3. Compare your version with the excerpt and mark what you missed.
  4. Work through the three examples above with pen and paper.
  5. Explain Red triangle (badge) out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Red triangle (badge) in simple terms?

The red triangle, also known as the red wedge, was a required badge worn by left-wing dissidents incarcerated in Nazi concentration camps during World War Two. The red triangle patch pointing upwards designated prisoners within the jurisdiction of the Wehrmacht, including prisoners of war, spies, a…

Why does Red triangle (badge) matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Red triangle (badge)?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Red triangle (badge).

Tags

  • Anarchism in Germany
  • Anti-fascism
  • Communism in Germany
  • Far-left politics
  • History of anarchism
  • History of socialism
  • Left-wing politics in Europe
  • Reappropriation
  • Red symbols
  • Resistance against the Axis powers
  • Socialism in Germany
  • Terminology of Nazi concentration camps

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