The Iron Cross is considered to be the Prussian national symbol, dating back to the freedom war against Napoleon. It was used as the symbol of the Military of Germany, as well as a German military decoration. As a decoration it is only awarded in times of war (to this date there are crosses from 1813, 1870, 1914, 1939).
Iron Cross 2nd class. Reverse (1813)
Logo of the German army (Bundeswehr)
Iron Cross - Blücherstern
Knight's Cross of the Iron Cross with Oakleaves, Swords, and Diamonds (WW II)
Knight's Cross with Golden Oakleaves, Swords, and Diamonds (1944 WW II)
Iron Cross 1st class (1870)
Exemple de brevet (Besitzzeugnis) accompagnant la Croix de fer de 2ème classe (WW I)