First Canadian Army
The Army was formed in early 1942, replacing the existing unnumbered Canadian Corps
Canadian Corps (World War II)
The unnumbered Canadian Corps was the first corps-level military formation established by the Canadian Army during World War II. A four-division Canadian Corps had existed during the First World War...
, as the growing number of Canadian forces in the United Kingdom necessitated an expansion to two corps
A corps is either a large formation, or an administrative grouping of troops within an armed force with a common function such as Artillery or Signals representing an arm of service...
. By the end of 1943 Canadian formations in the UK consisted of three infantry divisions, two armoured divisions, and two independent armoured brigades.