U: Did you mean...?

The U-boat, short for Unterseeboot (undersea boat), was the name for submarines used by the German Navy during the First World War (1914-18) and Second World War (1939-45). In the two Battles of the Atlantic...

A photograph taken during the First World War (1914-18) showing a U-boat of the German Imperial Navy sinking an Allied steamer. (Imperial War Museums)

A photograph showing U.S. troops carrying Bangalore torpedos on Omaha Beach during the Normandy Landings which began on D-Day 6 June 1944. (Imperial War Musuems)

A photograph of the German U-Boat 570 after it was captured in 1941 and renamed HM Graph during the Second World War (1939-45). (Imperial War Museums)

U.S. Senate gallery ticket to the impeachment proceedings against President Andrew Johnson, Washington, D.C., 27 May 1868. After the assassination of President Abraham Lincoln in the spring of...

Today, Minnesota is a highly diverse and evolving state. Many initiatives are teaching residents about the state's true history, helping people to make sense of the past and move forward in a good way. Efforts...

A photograph taken in 1917 during the First World War (1914-18) showing a U-boat (UC-1 class) of the German Imperial Navy. This type of submarine was used to lay mines. Imperial War Museums, London.

This map illustrates the fiercely contested U.S. presidential election of 1800, pitting Federalist incumbent John Adams against Democratic-Republican Thomas Jefferson. An electoral tie with running mate...

The captured German Imperial Navy U-26 U-boat during the First World War (1914-18). (Imperial War Museums)

A photograph taken during the Second World War (1939-45) showing Admiral Karl Dönitz (1891-1980), who was head of the German U-boat service, congratulating U-Boat crews. Taken in May 1942. (Imperial War Museums...