On 1 April 1919 as part of the restructuring based on experiences during the Great War, a regular (Permanent Active Militia) component was established as the Canadian Signalling Instructional Staff.
From the outset of the Second World War and before Canada's participation in 1939 members of the RCCS were active setting up radio equipment and signalling infrastructure at Camp X near Oshawa on Lake Ontario.
[citation needed] Finally, the RCCS was aligned in nomenclature with the regular component as The Royal Canadian Corps of Signals on 22 March 1948, after the conclusion of the Second World War.
Princess Patricia's Canadian Light Infantry (PPCLI), with their attached signallers, held their position against a much larger enemy force during the first North Korean spring offensive.
With such efforts by the PPCLI and signallers, The UN mission stopped North Korean aggression and subsequently provided deterrence that lead to an armistice, signed on 27 July 1953.
On 19 April 2013, Minister of National Defence, Peter MacKay, announced that the designation of "Royal Canadian Corps of Signals" would be restored for the army component within the Communications and Electronics Branch.