Canada Post is picking this fight

Canada Post serves Lock out notice declaring uncertainty about potential work stoppage is affecting business. Meanwhile it's Canada Post management that is creating that uncertainty while the union refrains from issuing a strike notice and makes it clear they want to settle the dispute at the bargaining table.

This fight is 100% unnecessary and 100% being picked by management.

Their middle of the night press release using many many words to avoid using two short ones:  Lock and Out:

 Management, the media and all the usual suspects will be rushing to call this a Strike at every opportunity.  This is deliberate deception to obscure who is launching the first strike.  Do not fall for it and correct it every time you see it.