R. Firth, "Symbolism of Flags"

The symbolism of flags lies primarily in their display.

A flag is basically a social symbol.

Flags may serve as a symbol for the unity of a large body of people.

They may embody ritual values in their color, shape, or design

They may contain identifactory devices or heraldic devices.

Flags may mark out personal life crises in a dramatic way.

Flags have a widespread use as a signaling device.

Flags may represent ideas or objects of value.

The military uses "colors" to denote rank, status, and identity

Flays may function as "symbols of situation" (white flag)

The idea of a thing (national flag) and the idea of its symbol are closely united in our minds.

The flag is the representative of a very general object, a country

The material symbol becomes in itself an object of sentiment

Attitudes to the symbol tend to take shape in action

National flags are treated with special reserve and represent "society" in its broadest political aspect.

"Expressions":

"showing the flag"

"planting the flag"

"displaying the colors"

”flags of convenience"