WWII Helpful Info

Everything in italics advanced level info. Not vital for the novel. 

Wehrmacht (German Armed Forces) 1935-1946 (Preceeded by the Reichwehr)
  Heer (Army) 
  Luftwaffe (Air Force)
  Kriegsmarine (Navy)
SS (Schutzstaffel)
  Waffen-SS (Armed-SS)

Army (Field Marhal or General)
2+ Corps (100,000 to 150,000 men)
Corps (General or Lt. Gen.)
2+ Divisions (25,000 to 50,000 men) 
Division (Lt. Gen or Maj. Gen.)
3+ Brigades or Regiments (10,000 to 15,000 men) 
    Brigade (Maj. Gen, Brigadier Gen, or Colonel)
    3+ Battalions (1500 to 3500 men)
    Regiment (Colonel)
    2+ Battalions (1000 to 2000 men)
Battalion (Lt. Col.)
4+ Companies (400 to 1000 men)
Company (Captain or Major)
2+ Platoons (100 to 250 men)
Platoon (Troop) (1st Lt.)
2+ Squads (16 to 50 men) 
Squad (2nd Lt.)
2+ Sections (8 to 24 men)
Section (2nd Lt.)
(4 to 12 men)

Wing (Geschwader) 
(3-4 Groups)
Group (Gruppe)
(3 Squadrons/40 planes/1 airfield)
Squadron (Staffel)
(9-12 Planes)

[Anti-Personnel] (Rifle/Machine Gun)
[Anti-Personnel/Light Anti-Aircraft] (Light Infantry Support Artillery)
40-50mm [Light-Med Anti-Armor]
[Heavy Anti-Air/Med-Heavy Anti-Tank]
[Very Heavy Anti-Tank/Med-Heavy Field Artillery]
120-150mm [Heavy Anti-Entrenchments/Field Howitzers]
200-350mm+ [Super Heavy Anti-Ship/Anti-Fortification] (Naval Guns/Railway Guns)

I will be adding more to this as I see fit.