When Zoro was very young, he trained the art of swordmanship at Koshiros dojo in Shimotsuki Village. There he met Kuina, a young beautiful woman who also was the daughter of Koshiro. She was an incredibly skilled swordsman, or woman i guess. Kuina and Zoro sparred every day and kuina would always win. So Zoro started trainign with 2 swords to get the upper hand, but she would still beat him. That is when he started training the three sword style, where he grips one sword with his teeth. He started gaining on her but she was still the best swordsman in the dojo. After 2001 fights Zoro had still not won a single fight, but he challenged her to a fight with real swords, and she accepted. However the day after the vow she fell down the stairs and died when she was getting a sharpening block. He blamed her for running away from the vow, but he was just a kid who was finally about to beat his rival/love interest. From that day on Zoro went on to become the strongest swordsman in the world, while making Luffy the pirate king. Of course that is now ancient history, as Zoro is long since retired, before he join the NFSL.
![[Image: TwwJboz.png]](https://i.imgur.com/TwwJboz.png)