Submarines.
Including operational losses about 217.
U boats were invented in 1914 for WW1
There were about 1,012,000 people form the UK that died in WW1.
99,000,000
ww1 was about 11,016,000. ww2 was about 59,028,000
9.8% drive boats, but travelers often transport their boats across seas
Guerre de Course (commerce raiding).
Over 2
these nuts
paul
Many people were killed to many to count