![PUBLIC DOMAIN
U-20, second from left, the German submarine that torpedoed and sank the RMS Lusitania in 1915.](https://hagadone.media.clients.ellingtoncms.com/ARTICLE_180709986_EP_-1_IBLHHPIAAGVO_t1170.jpg?5cc718665ab672dba93d511ab4c682bb370e5f86)
PUBLIC DOMAIN
U-20, second from left, the German submarine that torpedoed and sank the RMS Lusitania in 1915.
July 1, 2018
PUBLIC DOMAIN
U-20, second from left, the German submarine that torpedoed and sank the RMS Lusitania in 1915.
July 1, 2018