CAMPAIGN: Open world or not?

I would like another open world game like ODST. I don’t want it to be as “dead” as ODST’s world. I feel it should be a battlefield. You can run into UNSC patrols, you could be randomly ambushed, or you could run into an all out battlefield. It would be like Just Cause 3 or GW Wildlands

There’s some threads on the open world topic already - feel free to use one of those.