New Delhi, July 6 -- Canada is expected Monday to choose between German and South Korean bids to build a fleet of 12 submarines in one of its biggest-ever military procurements.

Germany's ThyssenKrupp Marine Systems and South Korea's Hanwha Ocean are competing for the contract to build 12 conventionally powered submarines worth tens of billions of dollars.

The announcement is expected before Prime Minister Mark Carney departs to the NATO summit in Turkey as NATO allies boost defense spending.

Carney is scheduled to tour a Canadian Armed Forces base in the Atlantic-coast province of Nova Scotia on Monday before announcing "new measures to make Canada more secure, resilient, and prosperous."

A spokesperson for Carney declined to confirm...