Flag of the Czech Republic

The national flag of the Czech Republic is the same as the flag of the former Czechoslovakia. Upon the dissolution of Czechoslovakia in December 1992, the Czech Republic kept the Czechoslovak flag while Slovakia adopted its own flag. The first flag of Czechoslovakia was based on the flag of Bohemia and was white over red. This was almost identical to the flag of Poland (only the proportion was different) officially adopted in 1919, so a blue triangle was added at the hoist in 1920.