Flags evolved through history, from battle signs to symbols of nations. Many of them played important role in the births of those same nations. Read here more information about flag history.
Most common use for flag is a national flag, symbol of its country. It can be of different types, depending of its intentional use. Here you can find more about history of national flags and civil flags and war flags.
Flags are used at the sea for centuries as symbols and as methods of communication before invention of modern communication systems. Here you can find more about history of maritime flags and flags at sea.
Oldest state flag that is still in use is flag of Denmark. There are many theories of its origin, historical and mythical. You can read about them and history of flag of Demark here.
One of the most famous flags in the world is the Union Jack. It is a national flag of the United Kingdom. It has an interesting history of how it came to be and if you can learn here more about history of Union Jack.
Flag of France - Tricolore - inspired many other flags in the world with its three colors and its symbolism. Here you can read a more detailed history of the Flag of France.
Oldest tricolor flag is Flag of the Kingdom of the Netherlands. That flag was inspiration for many world flags. Here you can find out more about History of Flag of the Kingdom of the Netherlands.
The flag of the United States is one of the America’s most widely recognized symbols. Read here more about history of flag of the United States.
The first national flag of the United States is Grand Union Flag that represented prevailing political ideas at the time. Here you can read more about history of Grand Union Flag.