The Only Two Submarines to Sink Enemy Ships Since WW2 Submarines played a very important role in WW1 and WW2 but there has only been successful in combat twice since then. This video examines these two engagements. The Only Two Submarines to Sink Enemy Ships Since WW2. Dark Docs. Please leave this field emptySign up to our Newsletter to get your weekly fill of History News, Articles and Quizzes We don’t spam! We won't share your contact details with anyone else. Check your inbox or spam folder to confirm your subscription.