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A diamond marking a hostile force on a military map.
Also known as: Red force frame, Hostile frame, Enemy unit symbol
A diamond — a square stood on its point — marks a hostile unit. The shape is deliberately distinguishable from the friendly rectangle at a glance and without colour.
A diamond-shaped frame indicates a hostile unit under NATO joint military symbology.
Conventionally red where colour is available, which is the origin of the term 'red force'.
A diamond drawn in outline, a square standing on one of its points, enclosing space for an icon.
The diamond marks hostile forces and the rectangle friendly ones.
Both are affiliation frames in the same map-symbology standard.