Fifth column

Rarity: Rare

A topic known well beyond its field, found in many languages.

Rarity follows how well known the article is: its views on the French and English Wikipedia over a year, and the number of languages it exists in.

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Society

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What Wikipedia says

A fifth column (or internal enemy) is a group of people who undermine a larger group or nation from within, usually in favor of an enemy group or another nation. The activities of a fifth column can be overt or clandestine. Forces gathered in secret can mobilize openly to assist an external attack.

Excerpt from the Wikipedia article “Fifth column”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

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