OTTAWA -- The country's top general says conflict prevention is going to be a key job for Canada's military and its allies in an increasingly uncertain world.

Gen. Jonathan Vance, the chief of the defence staff, is delivering that message today to a major defence industry conference.

Vance says he welcomes the government's new defence review, but he says Canadians need to accept that the days of decisive military victories, such as those of the two world wars, are long gone.

Vance's acknowledgment of a greater role for the Canadian forces in peacekeeping dovetails with the Liberal government's plan to return the military to that traditional role.

But Vance says modern peacekeeping is becoming more dangerous, and stopping conflict before it starts is complicated.

He says long-running missions, such as Canada's contribution to the multinational observer force in the Sinai Peninsula, face renewed threats from the militants of the Islamic State in Iraq and the Levant.