The paperback book Bozz is reading at the beginning of the film is Dalton Trumbo's famous anti-war novel "Johnny Got His Gun" about a horribly wounded veteran of the First World War.
When Bozz fights with Wilson in the barracks, kneepads can be seen under the stretched material of Wilson's fatigues. Elbow pads can also be seen on Wilson's left elbow through his open sleeve.
In the final scene when Paxton comes out to meet the bus, he is wearing the Service Dress Green uniform. The uniform is missing the lapel insignia (brass disk with US) on both sides and the National Defense Service Medal. In addition, if he had successfully completed Infantry AIT, he would have blue disks behind the lapel insignia and there would be crossed rifles on the left disk. There would also be a woven blue cord over the right shoulder.
Why wasn't Wilson court-martialled right after his first crime?
A
In real life, an individual such as Wilson would have been charged and imprisoned immediately for trying to commit murder. If Wilson was ready to kill a member of his own team during training, he would most definitely be able to go against his own side while abroad.However, the movie was trying to portray the fact that the military was desperate to have people able of killing on-board; Wilson had demonstrated his willingness for violence, hence the reason why he was kept.
Q
Why did Wilson start fighting with Bozz?
A
According to the DVD commentary, the director states that Wilson did not view Bozz as a person worthy of being a leader, nevermind being worthy to be in the army. Wilson despised Bozz for his views and actions, and therefore Wilson started expressing his anger physically.