Zod was born into a family of swordsmen, with the fates of all the generation of his family deeply intertwined with swordsmanship, so it wasn't a surprise to anyone when he started to become obsessed with the art ever since he was a child.
He was an unparalleled genius in swordsmanship, learning all the skills that his father who was the royal swordsmanship advisor had to teach at the young age of twelve and even surpassing him. Once he realized that he couldn't improve himself anymore, he set out on a journey to learn more swordsmanship styles.
By the time he was fifteen years old, Zod had already obtained a grasp of over a thousand types of swordsmanship styles, and other than the legendary swordsman that had a 'miracle', it was difficult to find anyone that could beat him in swordsmanship.