A pfc knows how to fill and pile sandbags. He would not have access to commo codes, planned operations, etc. those are made available to nco's and officers.

Bergdahl never should have been sent to Afghanistan. An Army shrink could have determined that fact. How long was Bergdahl in the Army before going to Afghanistan? He was only a pfc. With normal advancement, he should have been an E-4 by that time. Guys usually make E-3 out of AIT now and E-4 six months later.