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In the first design of the US Armored
Division the division consisted of 4 regiments (2 armor, 1 infantry, and 1
artillery). This design was known as the “heavy” division and included an
Armored Reconnaissance Battalion (ARB). In 1943 all armored divisions were
converted to a “light” design which eliminated the regiments and replaced
them with combat commands. This new design reduced the number of tank battalions
by half and included redesignating the ARB as Cavalry Reconnaissance Squadron
(Mechanized). Two divisions, the 2nd and 3rd Armored, remained in the
“heavy” organization throughout the war, and their ARBs (the 82nd and 83rd)
were not redesignated as cavalry during the war. Thus each of the Army's
armored division had an organic cavalry squadron to do the reconnaissance work
for the division.

81st CRS
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82nd
ARB
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83rd ARB
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25th CRS
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85th CRS
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86th CRS
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87th CRS
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88th CRS
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89th CRS
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90th CRS
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41st CRS
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92nd
CRS
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93rd CRS
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94th CRS
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23rd CRS
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30th CRS
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91st CRS
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117th CRS
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