Can we have a half or quarter continent like this?
Think future-style vietnam. Large columns of footsoldiers grinding away hidden by huge jungle trees.
I'm envisioning jungle warfare for foot soldiers with riverways and cleared roads for armor. The roadways should make for fast travel to get armor to base assaults but also make them vulnerable to ambush from the thick trees on either side.
Rivers and waterfalls make for terrain that allows hover vehicles like the magrider a little extra mobility, but a lack of long visiblity due to tall tree cover and winding roads means that most armor engagements happen on the roads at close range.
Air vehicles would be limited to interdiction around bases and blind bombing runs at the trees when they spot tracer fire coming up at them.