A typically circular symbol. The term is used in heraldry, but also commonly used to refer to a type of national insignia used on militaryaircraft, generally circular in shape and usually comprising concentric rings of different colours.
Notable examples:
United States has circle with a white star, with two white or white-and-red bars on the left and right side.
Japan has a single red circle, mostly bordered with white stylized after the Japanese flag.
Germany has a black iron cross with white borders.
Britain has a blue, white, and red circle.
Canada, Australia, and New Zealand replace the circle with a maple leaf, a kangaroo, and a kiwi bird respectively.
France has a red, white, and blue circle.
Italy has a red, white, and green circle. During World War II, it has white circle bordered in black with three black fasces in it.
Soviet Union had a five-pointed red star with white border. Belarus also uses this roundel after the collapse of the USSR, while Russia added blue border between the white and red section.
China also has a red star, but with a Chinese text meaning "8.1" and bordered by two red yellow-bordered bars.
Taiwan and the former Republic of China uses Kuomintag "white sun" symbol" contained within blue circle.
Sweden has a blue circle bordered in yellow with three gold crowns in it.
Poland has a red and white checkerboard design.
South Korea has a red and blue yin-yang bordered with three black bars on either side.
Israel has a blue six-pointed star on a white circle.
Indonesia has a white red-bordered pentagon design.
The Philippines has a blue, white, and red diamond with wings.
Finland has a white, blue, and white circle design. Formerly, they used a blue swastika on a white circle.
