Canada's first-ever defense-industrial strategy, published this month, suggests it, like Europe, can no longer count on the U.S. to be a security backstop, economically or militarily."Long-held assumptions have been upended — about the end of imperial conquest, the durability of peace in Europe, and the resilience of old alliances," the plan reads."In this uncertain world, it is more important than ever that Canada possess the capacity to sustain its own defense and safeguard its own sovereignty...