What is the history of the Union Jack?

The Union Jack, the national flag of the United Kingdom, was first created in 1606, combining the flags of England and Scotland following their unification under King James I. In 1801, the design was updated to include Ireland, incorporating the St. Patrick's Cross. The flag symbolizes the political union of these nations, with its distinctive blue field, red crosses, and white borders. While often associated with British Imperialism, the Union Jack has evolved into a symbol of national identity and unity.