First of all, this is an execution, not a "target practice" as
they are too close for practice.
Anyway, disobeying a direct order usually means facing court
martial. Of course, in a fair trial, disobeying an order that is
proven unlawful is justifiable.
However in most armies, especially the Japs in WW2, Soviets, NKPA
in Korean War etc - disobeying a direct order can mean instant
death. For example you join the other end of the firing squad in
the picture.
They might condone an officer shooting a insurbodinate soldier
immediately as they believe that this is the only way to keep the
rest of the troops in line.
In these situations, you might not even live long enough for court
martial.
