What is the historical significance of the red maritime flag?

The red maritime flag has a rich history dating back to the 17th century. By the mid-17th century, the Baucans, now known as the Bloody flag or Flag of Defiance, had evolved into a conventional maritime flag and was in widespread use. It was raised in cities and castles under siege to indicate that they would not surrender. According to Chambers Cyclopedia (1727–41), “The red flag is a signal of defiance and battle.”

Early Use

The red flag was used to signal defiance and battle, and its use was not limited to maritime contexts. It was also used on land to indicate resistance to an enemy or to signal a refusal to surrender.

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