Mehn this was a short and concise history of submarines. So all those lives were sacrifised so we could have what we know as tge submarine today.
JP holland must have veeb a brave man himseof for attempting what killed many in the past. What chance did he have to think that his would become a success when others failed? Thats bravery.
You have J.P. Holland confused with H.L. Hunley. Holland did not invent the H.L. Hunley submersible which sank 3 times.
That's true. Hunley was the one who actually built the submarines some years ago. It's probably a typing error.