The Union Jack flag originated in 1606 with the union of the flags of England (St. George's Cross) and Scotland (St. Andrew's Saltire), and was later updated in 1801 with the addition of St. Patrick's Saltire to represent Ireland.

1. Union Jack
The History of the Flag

2. St. Andrew + St. George
(12th April 1606)

3. St. George & Andrew + St. Patrick
(1801)

4. Union Jack

5. The Birth of Union Jack