Swords are long pointy things that people can use to fight each other. Swordsmanship is a fancy word that means learning how to use a sword really well.
To be good at swordsmanship, you have to practice a lot. You need to learn how to hold the sword correctly and how to move your body to make strong swings. You also need to learn how to dodge when someone is trying to hit you with their sword.
There are many different types of swords, like the katana from Japan or the broadsword from Europe. Each type of sword requires different skills to use it well.
In sword fighting, there are rules that you have to follow. You can't just hit your opponent wherever you want, like in the head or the back. That would be very dangerous! Instead, there are certain spots on the body that you can hit, like the arms or the legs.
If you get really good at swordsmanship, you might be able to compete against other people who are also good at it. Or, you could use your skills to protect people, like a knight in a castle protecting his people from attack.