As the war progressed it was recognised that these grades were not sufficient for the acts of bravery committed in the field of battle so further grades were added: Oakleaves and Swords, Oakleaves and Swords with Diamonds and finally the Golden Oakleaves with Swords and Diamonds.

While not officially a cross, the German Cross in Gold (DKiG) was so named for the swastika in the centre. It was not officially part of the Iron Cross series but to be awarded it, the recipient had to have been already been awarded the Iron Cross 1st Class. However, the DKiG did not have to be awarded for the Knight's cross to be bestowed, so it can be a little confusing. In reality many Knight's Cross winners did not hold the DKiG.

The German Cross was instituted in 1941 and this date can be seen on the wreath.