The German Field Army groups had no fixed organization. During
the first two years of World War II, there were five army
groups: two (Nord and Sud) for the Polish campaign, and three
more (A-B-C) for the Western campaigns. Each Army Group
(Heeresgruppe) was composed of two or three armies with perhaps
400,000 men. There were 14 armies, each Army (Armee) was
composed of three or four corps with about 200,000 men, and,
from June 1940, two reinforced Armored Corps, called
Panzergruppe or Armored Groups (von Kleist and Guderian) each
one controlling three motorized corps. Altogether, there were 33
corps (1-13,17,21,23-30,38,40,42-4,46-9), each Corps (Korps)
with two to five infantry divisions and perhaps 60,000 men; and
seven motorized corps, each Motorized Corps (Korps(mot)) with
two or three armored and motorized divisions, and one (XV) with
three light divisions. One cavalry division and the four
mountain divisions came directly under the control of their
respective armies. During the Blitzkrieg period 143 inf