The Importance of Submarine Attacks

A thousand Imperial Japanese army soldiers went down with the Gilton Maru Gaota. That's a thousand guys that never made it to where they needed to be because of submarine attacks much like this. So every one of those that you knock out is a significant blow to the enemy's capability to move men around. And if you've sunk enough of the troop transports, you're forcing your enemy to now use these freighters,. then that's other cargo that they can't move on that voyage.