Women With Swords
You don't see many sharp pointie things in climate fiction yet. You should, considering that repeating guns are a product of a complicated manufacturing and supply chain and will almost certainly be something only larger economic and political entities like city states have in the next Dark Age. Guns like they had in the Revolutionary War, flint locks and black powder guns certainly are going to be able to be made in small blacksmith shops but the science of percussion caps means you must have a specialist to make them. That's why almost everyone in the Future will be carrying a bladed weapon as well as their gun.
There is also just too much high quality steel laying around, for people in the Future not to be carrying good weapons.
So for a writer its important to understand how to write a sword fight well. They are not "hack, slash, run them thru and celebrate" kind of things.
Here is a very good Youtube channel to check out.
Not the least because, there will be women fighters. And men who aren't the size of Conan the Barbarian. Her observations are a great way to develop a sense of what makes sense and is possible in a bladed fight.
As a writer, I will make one suggestion. Choreograph out any fight you write in detail. Step by step, foot placement by foot placement, chair thrown or door crashed through. You may not use all the information you get from doing this, but it will give you a clear idea of how the scene progresses.
I have a novel where the first chapter has a hand to hand fight between the hero and several others, which goes on for 20 pages. Knowing how that progressed was important to keeping the narrative intact and flowing.
Have you written in a bladed weapon fight? How did you do it?