The "P" symbol[1] or "P" badge[2] was introduced on 8 March 1940 by the Nazi Germany General Government in relation to the requirement that Polish workers (Zivilarbeiter) used during World War II as forced laborers in Germany (following the German invasion and occupation of Poland in 1939) display a visible symbol marking their ethnic origin.
The symbol was introduced with the intent to be used as a cloth patch, which indeed was the most common form, but also reproduced on documents (through stamps) and posters.
[citation needed] The choice of color and shape might have been chosen to avoid any association with the national symbols of Poland.
[3] It was the first official, public badge-like mark intended for identification of individuals based on their racial or ethnic origin (or other social characteristics) introduced in Nazi Germany, preceding the better-known "Jewish yellow star" badge introduced a year later, in September 1941.
[2] In January 1945 the Central Office for Reich Security proposed a new design for a Polish badge, a yellow ear of corn on a red and white label, but it was never implemented.