What you call them depends on where they're made. A U-boat is nothing more than the Anglicized term for a German submarine and isn't strikingly different from U.S. subs. The whole "boat ...

Led by “eager and aggressive” young lieutenants, U-boat crews operated under the German tradition of Auftragstaktik, “which allowed for great flexibility in accomplishing a mission ...

The U249, which was the first German U-boat to arrive in UK waters, came into Weymouth Bay and surrendered. The commanding officer went on-board with his crew and took command. The first things ...