Well first things first. The US Army has been funding exoskeletons for years. At this time I think they are simply planning on them to be used for effort reduction by individuals doing manual labor. There is or was a push to get something in the field to reduce the burden to infantry troops. The Army would like to reduce the typical load infantry troops take with them on patrol. They are literally wearing out human beings because of the excessive loads required by soldiers in the filed. Likely on in SOF at first. But the concept is hamstrung by reality that you need a constant supply of power. So either you bring loads of heavy batteries with you or it generates power also. Which typically leads to noise. So the SOF community doesn't want it. If it raises their noise level in the field it becomes a liability.

Eventually you will see someone come up with a way to reliably and simply power something along the lines of an exoskeleton and when they do the military will be early adopters. And yes eventually you will see them used in combat.

https://en.wikipedia.org/wiki/Powered_exoskeleton

http://www.thedonovan.com/archives/modernwarriorload/ModernWarriorsCombatLoadReport.pdf