Sorry but not a lot of information to work with.
Lots of great ideas from other moms though.
Wishing you all the best.

I am feeling for you…
Not really sure what advice to give here because it really depends on what it is that has caused the friction in the first place…

If you see them outside say hi or smile. They may reciprocate and you may be given an opportunity to ask them over for a coffee.

I would try to move past any issues and try to be polite to them whenever you see them. It can be a difficult situation but it would certainly be a much better scenario if you all get along!

yeah just try to be civil and depends on how they are affecting you.

Depends on them in some ways. My parents (due to noisy small children and pets) got off on the wrong foot with many years ago when they moved in. After the moving chaos settled It took a while but they kept being consistently civil and friendly so eventually the neighbours say hi back. It depends on what happened but you can approach it directly and say things seem to have got off on the wrong foot and you would like to be friendly neighbours. Cliche but bake something too?
But if it all fails you tried and some people won’t change so don’t beat yourself up. Just keep being friendly at a distance. Hope it works out!

Without knowing the issue it is a bit hard to give advice. Do you have a common interest at all?
Does it involve children at all? friends of ours moved into a predominantly rental area -mainly from investors. The day they moved in they were greeted with some uncouth language from the kids as they were riding past. They were very glad their own young children weren’t with them. Fortunately they moved further down the street then to the country but not soon enough as far as my friend was concerned as despite their politeness towards them it was all in vain. It is difficult to know whether to ignore the issue and discuss it and reach a compromise. Try not to lay on the blame factor too much even though you will be tempted to do so.

I doubt much can be done – besides you being always polite. It will be a great relief once they move on … Good luck!