Jews were forced to wear a yellow Star of David that said "Jude" meaning "Jew."
A yellow Star of David.
Jewish star.
The Jewish people were forced to wear patches to identify them. They were also tattooed and marked with branding irons then segregated.
To identify them as Jewish
The Star of David.
A Jewish batch.
Novanet: He forced Jews to wear yellow star badges.
Kippa
If you mean how were Jews identified, they were made to wear a white armband which had a yellow star on it so that everyone knew they were jewish. :)
There was the Yellow Star decree which forced Jews in Germany to wear a yellow star, in other regions they had to wear a blue star on a white background. Most Jews in the camps had to wear a prisoner uniform.
Some Jewish people wear the star of david because it is a symbol of the nation of Israel. Others because it's the symbol of the Jewish people all over the world. During World War II, European Jews were forced to wear the Star of David on their clothes to identify themselves as Jews.