An acquaintance of mine has signed up for the US army and is now in his first six months, I guess what's called basic training. He was not allowed to bring books and asked us to send him reading material.
A military website states for basic training:
Dice, playing cards, dominoes, magazines, newspapers and books will be confiscated.
(For completeness: There is an exemption for one religious book.) I understand that there may be little time or remaining energy in boot camp to read but is there an official rationale which was brought forward when the regulation was instated?