During World War 2, it is reported that over 2,000 variants of Japanese Submarines were used during World War 2. Out of this, it is estimated that 10,000s were likely to be used during WW2.
USSR; US; UK; Germany & Japan.
Yes, they did.
326
2,200,000 Soldiers 97 Warships 40 Submarines.
Yes, many submarines were used in WW1 by most of the major combatants.
1, 200,000 Soldiers 30 Warships 11 Submarines.
The British lost 76 submarines during WWII.
Why don't you just Google "World War 1 Submarines?"
52
9
eighty five
759