You'd have soap. If you were wounded in Britain at that era, your local leech (doctor) would have a quite effective means of disinfecting your wound, even if he doesn't quite grasp the exact principles of why it works. More can always be said, of course, so if anyone else would like to contribute, please don't let this post stop you! For the meantime, here's some previous posts on the matter:

• u/Noble_Devil_Boruta examines the history of soap and its availability,
• and u/BRIStoneman looks at what Bald's Leechbook recommends for the cleansing of wounds.