Key Events of the period
April 4 , 1949 — The North Atlantic Treaty Organization ( NATO ) was created .
June 25 , 1950 — North Korea invaded South Korea .
November 22 , 1950 — Defence Construction Limited came into being , when Cabinet authorized Wartime Housing Limited ’ s name change .
May 10 , 1951 — The Charter for Defence Construction ( 1951 ) Limited was signed , creating a fully-fledged Crown corporation that reports to the Minister of Defence Production .
August 1 , 1951 — Canada and the United States reached an agreement to establish the Pinetree Line of radar stations .
The Pinetree Radar Line at RCAF Station Parent , Quebec , 1960
2 BREAKING NEW GROUND DEFENCE CONSTRUCTION CANADA