World war 1 sumbarine

During World War I, submarines, particularly German U-boats, played a crucial role in naval warfare. They utilized stealth to attack enemy ships, targeting military vessels and merchant ships to disrupt supply lines. The unrestricted submarine warfare strategy led to significant losses for the Allies and ultimately contributed to the United States entering the war after incidents like the sinking of the Lusitania. The conflict marked the beginning of the submarine's importance in modern naval strategy.