Battle flag is a term commonly used to refer to a flag used by a military unit during a war or battle. However, there are several other synonyms that can be used to describe this type of flag. One synonym is war banner, which is a flag or banner used to represent a military force in battle. Another synonym is battle standard, which is a distinctive flag used by a military unit as a symbol of its identity and allegiance. Other synonyms might include regimental banner, regimental colors, or simply military flag. No matter what term is used, the battle flag remains an important symbol of military power and pride.