Quarantine "yellow jack" but this was also a name for yellow fever, which probably derives its common name from the flag, not the color of the victims (cholera ships also used a yellow flag). The plain yellow flag ("Quebec" or Q in international maritime signal flags) probably derives its letter symbol for its initial use in "quarantine", but this flag in modern times indicates the opposite—a ship that declares itself free of quarantinable disease, and requests boarding and routine port inspection. Australia has perhaps the world's strictest quarantine standards. Quarantine in northern Australia is important because of its proximity to South-east
White flag Buddhist countries, white is the colour of mourning, so a white flag is used where other cultures might fly a black flag. During the Afghan Civil War, the Taliban used a plain white flag. When it took over Kabul in 1996, and established the Islamic Emirate of Afghanistan, the white flag became the national flag of the country, representing "the purity of their faith and government". After 1997, the Taliban added the Shahadah to the flag. During the Genpei War (1180–1185), the Minamoto clan fought under a white flag while the Taira clan fought under a red flag. As successive