KOSTYANTYNIVKA, Ukraine—On the sun-drenched eastern front of this grueling war, Ukrainian drones are doing more and more jobs, from killing Russian troops to evacuating casualties to bringing dinner ...

The calm morning waters of the North Sea turned into a nightmare for the British Royal Navy as the German U-boat U-9, under ...

It all started with the Mark I—the world’s first combat-ready tank. In this video, we take a look inside this groundbreaking WWI vehicle, from its cramped interior and gear systems to the weapons and ...

Sometimes history lies hidden just around the corner. Just south of Washington, D.C., is a graveyard with more than 100 wooden ships that date to World War I — the Ghost Fleet of Mallows Bay.