?? May 1879 - CP
 
?? ??? 1883 - CP
 
16 Mar 1892 - CP
 
?? Jun 1901 - CP
 
?? Feb 1903 - CP
 
?? ??? 1910 - GTR
 
12 Mar 1912 - CNoR
 
22 Aug 1950 - CN/CP
 
24 Aug 1973 - CN/CP
 
18 Mar 1995 - CN
 
24 JuL 2009 - VIA
 
28 Nov 2009 - CN
 
23 May 2012 - CP
 
29 May 2018 - CP
 
19 Nov 2019 - CN
 
16 Mar 2022 - CP
 
20 Jun 2022 - CN

Labour difficulties with Pacific railway construction in 1879, exacerbated by rough conditions starting several short-term wildcat walkouts, usually a day or so in duration, finally led to a full-scale strike in May of 1879.
 
The strike was carried out against contractor Joseph Whitehead on one section of the line because of his failure to live up to his end of the understood contract with his workers, to provide the promised wages, reasonable board, and adequate medical attendance.
 
Whitehead's limited resources and some serious miscalculations in using those resources, particularly trying to buy political influence, led him to try to cut corners by reducing wages and delaying payment.
 
This brought worker dissatisfaction to a head and the militia was called out to maintain order.
 
As a result of the strike, the workers did secure the back pay owed them (through a government loan), but attained none of their other objectives, and many of them lost their jobs.
 
As for Whitehead, the strike contributed to his inability to fulfil the terms of his government contract.
 
In turn, this experience, along with difficulties with other small contractors, perhaps helped to confirm the determination of the Conservative federal government after 1878 to abandon the system of limited contracts in favour of a single contract to complete the entire line from Montreal to the Pacific Coast.
 
David J. Hall - "The Construction Workers' Strike on the Canadian Pacific Railway 1879", Labour, Vol. 36 (Fall, 1995), pages 11-35.