Jeffery Frazey, a team leader. You're talking about several hundred guys out there, trying to link up and mass their fires on one objective. You begin to lose that command and control. Guerilla forces usually fight in squad or platoon-sized elements. They like to send out little teams to mess with you.
Soldiers depend on the effectiveness of their squad's training.
You've got water for river crossings and steep hills. It involves everything. This is true light infantry country. You have to carry everything you need and depend upon every asset you have to sustain your force. There is no one battlefield operating system more important than the other.