The following is a general overview of the Heer main uniforms, used by the German army prior to and during World War II. Terms such as M40 and M43 were never designated by the Wehrmacht, but are names given to the different versions of the Model 1936 field tunic by modern collectors, to discern between variations, as the M36 was steadily simplified and tweaked due to production time problems and combat experience. Insignia Uniforms of the Heer as the ground forces of the Wehrmacht were distinguished from other branches by two devices: the army form of the Wehrmachtsadler or Hoheitszeichen (national emblem) worn above the right breast pocket, and – with certain exceptions – collar tabs bearing a pair of Litzen (Doppellitze "double braid"), a device inherited from the old Prussian Guard which resembled a Roman numeral II on its side. Both eagle and Litzen were machine-embroidered or woven in white or grey (hand-embroidered in silk, silver or aluminium for officers and in gold bullion for generals). Rank was worn on shoulder-straps except for junior enlisted (Mannschaften), who wore plain shoulder-straps and their rank insignia, if any, on the left upper sleeve. NCO's wore a 9mm silver or grey braid around the collar edge. Shoulder-straps and, in many cases, collar patches were piped or underlaid in Waffenfarbe, a color code which often identified the branch of service to which the unit belonged: white for infantry, red for artillery, rose-pink for Panzer troops and so on. Most belt buckles had the Heeresadler with the inscription "Gott mit uns" ("God with us"). Field and service uniform Field Tunic (Feldbluse) Model 1936 When the Nazis came to power in early 1933 the Reichswehr, the armed forces of the Weimar Republic, were near the end of a two-year project to redesign the Army Feldbluse (field-blouse). Beginning in that year the new tunic was issued to the Reichsheer and then the rapidly growing Wehrmacht Heer, although minor design changes continued to be made until the appearance of the standardized Heeres Dienstanzug Modell 1936. The M36 tunic still retained the traditional Imperial and Reichswehr uniform color of grey-green "field gray" (feldgrau) wool, but incorporated four front patch pockets with scalloped flaps and pleats (on Reichswehr tunics the lower pockets were internal and angled). The front was closed with five buttons rather than the previous eight, and the collar and shoulder straps were of a dark bottle-green