The Red Cross is an international organization headquartered at Geneva. According to the Geneva Conventions, the red cross flag is to be placed on medical vehicles and buildings to protect them from any military attack on the battlefield. The flag has a red cross on a white background.
Originally there were four such Red Cross emblems: the Red Cross, the Red Crescent, the Red Lion and Sun, and the Red Crystal. The Red Lion and Sun is no longer in use, while the remaining three still remain.
The Red Cross Flag is used as a logo by all organizations which are part of the International Red Cross and Red Crescent Movement. Article 7 of the 1864 Geneva Convention, defines the Red Cross as a protection symbol. Article 38 of the 1949 Geneva Convention reads "For the Amelioration of the Condition of the Wounded and Sick in Armed Forces in the Field".
According to the International Committee of the Red Cross (ICRC), the flag of the Red Cross was formed by reversing the colours of the Swiss flag. However, this remains disputed due to lack of any clear evidence.