U-boats were naval submarines operated by Germany, particularly in the First and Second World Wars. The term is an anglicised version of the German word...

Plan Z was shelved in favour of a crash building program for submarines (U-boats) instead of capital surface warships, and land and air forces were given...

lesser maximum diving depth than earlier U-boat designs. It was planned that final assembly of Type XXI boats would eventually be carried out in the Valentin...

Germany and its occupied countries, which were also known as U-boat pens (after the phrase "U-boat" to refer to German submarines). Among the first forms of...

Type VII U-boats were the most common type of German World War II U-boat. 703 boats were built by the end of the war. The lone surviving example, U-995, is...

U-boats. U-177 U-178 U-179 U-180 U-181 U-182 U-195 U-196 U-197 U-198 U-199 U-200 U-847 U-848 U-849 U-850 U-851 U-852 U-859 U-860 U-861 U-862 U-863 U-864...

The Type XIV U-boat was designed to resupply other U-boats, being the only submarine tenders built which were not surface ships. It was nicknamed the...

The U-boat campaign from 1914 to 1918 was the World War I naval campaign fought by German U-boats against the trade routes of the Allies. It took place...

U-27 U-28 U-29 U-30 U-31 U-32 U-33 U-34 U-35 U-36 U-45 U-46 U-47 U-48 U-49 U-50 U-51 U-52 U-53 U-54 U-55 U-73 U-74 U-75 U-76 U-83 U-84 U-85 U-86 U-87 U-99...

1943—the Italian Archimede and ten German boats: U-128, U-161, U-164, U-507, U-513, U-590, U-591, U-598, U-604, and U-662. By fall 1943, the decreasing number...