I don't have any affiliation with this guy but this write up is pretty good for those who have never been in the military and are new to gear.
http://mountainguerrilla.blogspot.com/2012/05/some-notes-on-current-load-outs-and.html
http://mountainguerrilla.blogspot.com/2012/05/some-notes-on-current-load-outs-and.html