Flags have been utilized for hundreds of years to indicate a group of some kind. In medieval times they were used to show the crest or shield of a kingdom as its cavalry rode into battle. With the formation of countries, they’ve been used to signify and make a visual identity for a country. Every country in the world has a national flag that they take pride in. Flags are also used to represent certain minority groups, such as the rainbow flag used by homosexuals, and the symbolic red, black and yellow Australian aboriginal flag.