Okay kiddo, so back in the olden days, people used swords to fight. In Germany, there were some people who were really good at fighting with swords and they wanted to teach others how to do it too.
They studied how to use swords in different situations and came up with different techniques for fighting. They also wrote down their ideas in books so that others could learn from them.
The German school of swordsmanship was all about using swords in a smart way. They taught people to use their brains as well as their muscles when fighting.
Today, people still study the German school of swordsmanship as a hobby or sport. They learn the techniques from the old books and try to use them in mock fights with other people who also study it.
So that's a basic explanation of the German school of swordsmanship. Pretty cool, huh?