The Saltire is the flag of Scotland and also known as Saint Andrew's flag. It is instantly recognizable by the white cross on a blue background. St Andrew is associated with the Saltire. Legend has it that in 832 AD King Oengus II prayed to Andrew the night before a crucial battle against the Northumbrians. On the day of the battle a Saltire cross, an X appeared in the sky above the battlefield. The Picts took this as a sign from Andrew and they were subsequently victorious in battle.