A German U-boat, short for "Unterseeboot," is a type of submarine used by the German Navy, particularly during both World Wars. These vessels were designed for stealthy underwater operations, primarily to disrupt enemy shipping and naval forces. U-boats played a significant role in the Battle of the Atlantic, targeting merchant ships to cut off supplies to the Allies. The design of U-boats evolved over time, with advancements in technology improving their capabilities. They were equipped with torpedoes and deck guns, allowing them to engage in both offensive and defensive actions. The impact of U-boats on naval warfare was profound, leading to changes in naval strategy and tactics during the 20th century.