battle flag
war flag
military flag

The war flags of the first and second Serbian uprisings (1804-1815) are in several types.

The flag of Switzerland was introduced in 1889, also based on medieval war flags.

Very few countries use a war flag that differs from the state flag.

On Allied orders the war flag had to be hauled down.

In addition, from 1919, the first class could be awarded to the war flags of distinguished regiments.

All these sons united under one war flag given by Leszek.

However, flying a war flag in battle is unlikely with current warfare tactics.

Strong lights played on the stage, where young officers stood like marble statues holding upright the nation's war flags.

These are also considered war flags, though the terminology only applies to the flag's military usage.

Kali's emblem on his war flag is of an owl.