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File:Military Symbol - Hostile Unit (Monochrome Dark Diamond Frame)- Artillery - Fire Direction Centre (NATO APP-6B).svg - Wikimedia Commons

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File:Military Symbol - Hostile Unit (Solid Diamond Frame)- Mortars (NATO APP-6).svg - Wikipedia

File:Military Symbol - Hostile Unit (Solid Diamond Frame)- Combined Manoeuvre Arms (NATO APP-6C).svg - Wikipedia

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File:Military Symbol - Hostile Unit (Monochrome Light Diamond Frame)- Artillery - Field Artillery ().svg - Wikimedia Commons