The all-white flag is the national flag of that country.

France (Japanese milk law) France often surrenders and raises a white flag. In history, France did use the white flag as its national flag. France was ruled by Bourbon for hundreds of years before the Great Revolution, and white was the royal color of Bourbon. Today, the white in the French "tricolor flag" comes from the Bourbon dynasty, but the definition was revised after the French Revolution, and the national flag of the French Bourbon dynasty was a white flag. 18 13 10 in October, Napoleon was defeated in the battle of Leipzig, the first empire of France was temporarily destroyed, and the Bourbon Dynasty was restored with the support of the anti-French alliance. After the restoration of Bourbon, the national flag was changed to "Iris", also known as "White Flag". After the restoration of Bourbon, the French flag was changed to a pure white flag, which was no different from the white flag used in surrender. Because the pattern of "Iris Citi" is difficult to draw, France basically used a pure white flag as its national flag during the Bourbon Restoration. Although Napoleon's "Hundred Days Empire" once abolished the white flag of Bourbon Dynasty, the "white flag" as a French flag continued until the July Revolution of 1830.