If I understand it correctly, you get your rank (mine is Wachtmeister) based on the number of posts you make on SD. Is that correct? Is there a list of ranks posted somewhere, and how many posts it takes to get there?
This is what I have figured out so far. Some one else is going to have to fill in the rest. I didn't know what any of these titles meant until I just now looked them up. To tell you the truth I'm not too pleased with some of the titles. For instance, a search for Vizekorporal brings up Schutzmannschaft, which is not just a German army rank, but a Nazi German army rank. What to heck Kaesekopf?
Hellebardier - halberd-bearers. 0 to ? posts
Vizekorporal - "protective, or guard units"; collaborationist auxiliary police. ? to ? posts.
https://en.wikipedia.org/wiki/SchutzmannschaftKorporal - the lowest rank of the non-commissioned officers group. ? to ? posts.
https://en.wikipedia.org/wiki/KorporalWachtmeister - 'watch-master', guard duty. ? to 1500 posts.
https://en.wikipedia.org/wiki/WachtmeisterFeldwebel - "field usher", Staff Sergeant or Sergeant. 1500 to 5000 posts.
https://en.wikipedia.org/wiki/FeldwebelHauptmann - 'head-man', captain. 5000 to ? posts.
https://en.wikipedia.org/wiki/HauptmannOberst - colonel. or lieutenant colonel. ? to ? posts.
https://en.wikipedia.org/wiki/Oberst