noun
General Slang
blue on blue
BLOO on BLOO · noun · informal
A friendly-fire incident.
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Definitions
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An engagement in which friendly forces mistakenly fire on their own side; from map symbology where friendly ('blue') forces are marked in blue.
“Strict fire discipline kept us from a blue-on-blue in the dark.”
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blue on blue In A Sentence
Strict fire discipline kept us from a blue-on-blue in the dark.
Origin & Usage
US and NATO military terminology.
Variants
blue-on-blue
People Also Ask
What does 'blue on blue' mean?
It refers to a friendly-fire incident, where forces accidentally fire on their own side rather than the enemy.
Why is friendly fire called blue on blue?
On military maps and displays, friendly forces are marked in blue and enemy forces in red, so friendly-versus-friendly fire is 'blue on blue.'
Is blue on blue an official term?
It's standard US and NATO military terminology for a friendly-fire engagement, not just casual slang.
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