Guerre de Course (Commerce Raiding).
Germany
Germans
U-boats
Sinking merchant ships.
U-Boats
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U-boats=Submarines
They're german submarines, used in world war 1 and world war 2
U-boats are submarines. They were used for Guerre de Course (commerce raiding) and scouting.
'U-boats' was the name given to German submarines in both the first and second world war.
the U-boat was used to flip over the other rivals ships from under water
Moslty merchant ship, supply line disrupment.