British troops, several wearing protective leather helmets, clean and maintain a Mk I Male and Mk I Female tanks.
British troops in deep trenches lined with woven branches, on the Western Front in World War 1. Slate refers to gas alarm with Strombos horn. British soldiers immediately don their gas masks and take up defensive firing positions in their trench. Gas fumes are seen drifting over the trench. View from the trench, of gas cloud over No-Man's land, with barbed wire and some snow on the ground. [Note: The Strombos horn,was operated by compressed air and could be heard for several miles. But as use of gas shells increased, and such attacks tended to be localized, other alarms were employed, instead, such as metal shell cases, steel triangles, watchmen's rattles, klaxon horns, etc.] (World War I; World War 1; WWI; WW1)
German staged documentary titled 'Deutsches U-Boot Auf Kaperfahrt' shows a German submarine cruise at a German coast during World War I. German ships and U-boats at a dock in Germany. A German Navy officer disembarks from a ship at the dock. Torpedoes and supplies are loaded up on a U-boat. Crew members come aboard the U-boat. They push the ship away from the submarine. The German U-boat puts out to sea.
A German documentary about German U-boats attacking enemy ships in the Atlantic Ocean during World War I. A German U-boat underway in Atlantic ocean or North Sea Atlantic. The U-boat surfaces and goes underwater. Interiors of the U-boat showing German Navy personnel at work. An enemy ship is sunk by the Germany U-boat torpedo attacks.
German U-boat U-35 in Mediterranean Sea during World War I. The U-35 German U-boat underway at sea. Scene changes to be on board a British Q-boat "Suffolk Coast" as crew members thrown open hatches and man a deck gun aboard the ship. Scene returns to the German U-boat diving and seen as it goes underwater.
A documentary about German U-boat U-35 attacking enemy ships in the Mediterranean Sea during World War I. A German U-boat underway at sea. An enemy ship is encountered. German crew members fire a gun aboard the ship. An explosion occurs on the enemy ship and it sinks.