Each of the square symbolizes the persons who composes The Committee of Five. It is a league which had been established during the battle of Solferino also known as the bloodiest battle of the century.
The emblem of the knights is the Eight pointed cross
A red cross on a white background. It is the reverse of the Swiss national flag.
Saltire
Yes a prism can have a square cross-section
The emblem of St. George is called the St. Georges Cross.
Clara Barton founded the American Red Cross in 1881.
No, the Red Cross is not only an American organization; see the related link. The American Red Cross is an American Organization.
The white cross on a red square is the swatch logo
No, the American Red Cross doesn't have a hospital.
The president of the American Red Cross is Gail McGovern.
American Red Cross was created in 1881.
I know of no such car emblem.