Yes, they will. Geez, you're pretty ignorant of how effective militias are. You don't need nukes, tanks, or jets to defend a few homesteads. Most of those are easy enough to defeat with training and some good prep. I'm more concerned about quiet hive-mind drone swarms...
Why can't you conceive of people doing things together without force being involved? How poorly have you lived for that to not ebbed be a conceptual option to you?
WTF! Why would I duel someone over a broken contract? You're wild, in a bad way, if that's the first thing you think of. You can't even see how prone to violence and coercion you are. I get it. I used to think like that, too, but thankfully, I've learned to be better than that.