Until the late 1890's, the technology had not yet developed that made them able to safely submerge, stay submerged, and attack other vessels effectively.
Until John Phillip Holland designed and patented modern submarine technology (e.g., diesel-electric design, batteries, oxygen, ballasting systems, etc.) in the 1890's, the only previous successful submarine attack during wartime was the Confederate submarine H.L.Hunley. Since the Hunley was lost after her attack on the Union sloop-of-war USSHousatonic, and the wreck wasn't found/salvaged again until just a few years ago (the Hunley had sank and been raised twice prior), there was no definitive answer on why she was lost. Such information would've been critical in furthering submarine designs.
As such, submarines were seen as just another naval warfare failed experiment until Holland's USS Holland(SS-1) in 1897 (The US Navy's first commissioned submarine). Its success led to several new designs, and eventually the wide use of Unrestricted Submarine Warfare by the Germans in WWI, including the sinking of the British passenger liner RMS Lusitania.
the submarine played a key part in world war 2 for many countries, Germany used them extensively against British shipping and to destroy royal navy ships, the British used them again to destroy a few well known German ships, Japan had submarines as well like the midget submarine they also used to attack the US, ad the united states also had submarines in the pacific theater.
Virginia class submarine
David Bushnell launched what is regarded as the world's first submarine.
Wth they werent
The world's first atomic powered submarine was the USS Nautilus.
maybe there was, maybe there werent...
The USS Nautilus (SSN-571) was the world's first operational nuclear submarine.
A U-boat was a submarine used by Germany in World War 1 and World War 2.
The submarine you are thinking about was the USS Nautilus. It was the world's first nuclear powered submarine and commissioned into the US Navy in 1955
the men werent there at the time
Submarine warfare is a military tactic used by many nations where submarines are used to attack enemy ships or as a direct deterrent. This was used extensively by the Germans during World War II.
kristallnacht continued until the end of world was 2