German submarine used in World War I and II.
MilitarySubmarineNaval WarfareVehicle
Current best complexity is 6:
U-boat can be discovered in Concepts, categorized under Military, Submarine, Naval Warfare, Vehicle. German submarine used in World War I and II.
It has been discovered by 14 boards and crafted 31 times, first appearing 6 months ago. U-boat can be created from 18 recipes, and goes on to appear as an ingredient in 37 others.
U-boat was first discovered by Jozef's board 6 months ago. The lowest-complexity recipe (6) is held by [Monochrome].
Related concepts worth exploring include Marine, Fleet, Locomotive, Navy, Submarine, Fortress, and 6 more.