For two years, U-boats patrolled the inland Canadian waterway of the St. Lawrence River. During that time, they would sink multiple ships, take the lives of dozens of Canadian sailors and put a country on edge as the war reached the home front. Today, I look at the Battle of the St. Lawrence, a time when Canada had to defend its waters against a silent killer. It is a story of success and failures, spies and the tragic killing of civilians. Support: patreon.com/canadaehx Merch: https://www.ohcanadashop.com/collections/canadian-history-ehx Donate: buymeacoffee.com/craigu Donate: canadaehx.com (Click Donate) E-mail: [email protected] Twitter: twitter.com/craigbaird Threads: https://www.threads.net/@cdnhistoryehx Tiktok: https://www.tiktok.com/@cdnhistoryehx YouTube: youtube.com/c/canadianhistoryehx Want to send me something? Craig Baird PO Box 2384 Stony Plain PO Main, Alberta T7Z1X8 Learn more about your ad choices. Visit megaphone.fm/adchoices