During WW2, all the major countries involved used submarines.
They were used by submarines to navigate when not in open waters, They were also used by submarines and anti-submarine ships to locate enemy submarines.
Submarines todaee are used for underwater exploration,funn,new life underwater.
Shallow diving submarines are used for reef watching in many parts of the world.
Nuclear energy is used to power most modern submarines
submarines were used in WW1 and the weapons used were torpedos and a deck gun.
Both the Union and the Confederate had submarines, but the Confederate used them more often.
No, not really, submarines were first used successfully in the Civil War.
Yes, submarines were used by the Confederate Navy in the US Civil War.
World War I submarines were primarily used to locate and attack surface cargo and warships.
This is a very short answer, but it tells you the basics. Maths is used in science; in science, you measure amounts. Maths is used in history; you use dates. Maths is also used in geography; in geography you count population and take measurements. Maths is used in music as well; you count the beats, multiply the beats and arrange them. There are many other uses of maths in these subjects, if you don't constrain yourself to thinking that maths is STRICTLY hard arithmetic and algebraic problems you will see that maths is in everything you do. From cooking, to breathing, maths is everywhere.
Everywhere everyday you use maths for