1, 200,000 Soldiers
30 Warships
11 Submarines.
326
2,200,000 Soldiers 97 Warships 40 Submarines.
The British lost 76 submarines during WWII.
Yes, many submarines were used in WW1 by most of the major combatants.
Why don't you just Google "World War 1 Submarines?"
52
9
eighty five
759
USN about 250.
About 2,100 by many different countries.
World War I submarines were primarily used to locate and attack surface cargo and warships.