These are apparently variants of the German-made Leopard 2. The first two are actual tanks, while the other two are engineering vehicles. I don't know much more, however.
Apologies for the confusion - I was told they were Leopards by someone who I thought knew a lot about military stuff. After asking around, I found out that these are actually British Challenger 2 vehicles. Because they were on CP 421 (a Toronto to Winnipeg manifest), my suspicion is that they are headed out West (maybe to Alberta, where there is a British base). The Tioga Pass passenger car was supposed to have come East recently with another "special shipment", so perhaps the Brits were doing a vehicle swap-out.Really? The Leopard has 7 road wheels. The one in that image has 6 sized like the T-72. As far as I can tell, CAF engineering vehicles based on the L2 all have 7 wheels. This is really curious for me as a bit of a military equipment enthusiast.
Ah yes, I see it now. Forgot the Challenger also has six wheels. And the edge pattern in the side skirts matches up with Google images photos.Good conclusion. The images I was looking at for the Challenger had different side skirting but it seems was I was looking at was an applique skirting. The British Army has a permanent facility at CFB Suffield in Alberta.