In a few words some explanations to this issue.
There were two different sizes of the medal just to make a difference between Germans and natives. A native couldn’t get the same medal as a German.
The Emperor signed the deed of foundation on June 13th 1912.
The first medals were issued in March/April 1913, the last in 1918. Everybody who was involved in one of the conflicts according the battle list had to apply for it.
The only native soldiers who received the medal were Cameroon police troops for a conflict in 1912. No medals could be issued to natives for a conflict before Ponape 1910/11. This information’s were taken from German state archive.
Bernd