Feldgrau.net

In the forum I found the general numbers of the units, for Züge, Gruppen, Kompanien, etc etc. Though I didn't find out what ranks the commanders would need to be for them to command the units (Seeing as I can't rely on modern organizations of units from the US or UK).

Also, I'm not sure if the squad was mentioned there or if it was the truppe

Here are the units i'm curious about:
Heeresgruppe
Armeegruppe
Armee
Korp
Division
Brigade
Regiment
Abteilung
Kompanie
Züg
Gruppe
Halb-Züg
Kampfgruppe
Staffel
Kolonne

Danke!