The term "Black Banner" often refers to a flag or standard that is associated with various historical and cultural contexts. In Islamic history, it is linked to the Abbasid Caliphate, which used a black banner as a symbol of their rule. The black flag has also been adopted by various groups throughout history to signify rebellion or resistance. In modern contexts, "Black Banner" can refer to certain militant groups that use black flags to represent their ideologies. For example, the Islamic State has utilized a black banner featuring white Arabic text to symbolize their extremist beliefs. The use of black flags often conveys a message of defiance and unity among followers.