“Oct 2 – Had several read alerts during movie.”
So in this entry Mike mentions how these alerts took place during a movie. This is very interesting to me, even though he does not mention what movie.
Chances are him and the other soldiers were watching this at night, after finishing their duties for the day. It was most likely shown through a projector, while being projected onto a large sheet of some sort.
Movies were a large pastime of the soldiers during the war, to try and take their mind off the horror they saw on a day to day basis.