Notice that the US Red Cross conspires in the cover-up!
Surely the disastrous economy and the endless pro-war propaganda helps.
But one of the biggest recruiting tools is the suppression of history.
The fact is that soldiers have to worry about their own government at least as much, or maybe even more, than the enemy that's shooting at them.
For example, there's a long history of the US government happily throwing its POWs under the bus when its convenient for the "strategists."