The US, Russia, Great Britain, France, China and (recently) India have nuclear submarines.
Britain, France, Germany, Italy and USA all used submarines during WW1
From Wikipedia: Today, six countries deploy some form of nuclear-powered strategic submarines: the United States, Russia, France, the United Kingdom, People's Republic of China, and India Several other countries, including Argentina and Brazil, have ongoing projects in different phases to build nuclear-powered submarines.
As of October 2023, the countries known to possess nuclear submarines include the United States, Russia, China, France, and the United Kingdom. The United States has around 68 operational nuclear submarines, while Russia has approximately 60. China operates around 12, and both France and the United Kingdom have about 10 each. India is also developing its nuclear submarine capabilities and has launched its first operational vessel.
During WW2 the US Navy built 126 submarines.
The US helped France in world war 1 with submarines in the Atlantic.
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52 US submarines were lost in WW2. This was about 1 in every 5 submarines that the US had in WW2
2,200,000 Soldiers 97 Warships 40 Submarines.