He did not enter the army because of his 'pacifist' beliefs/ideals.
A group of 'pacifists' were protesting the war.
(..) Understood. Mr lieutenant. Do you have a light? What's your name? Private Johan Maria Muller. So, officers, in my squad there are pacifists. Lieutenant Bologa is one. And there are others like him. I find out only now! Lieutenant Bologa has remorse. Remorse in war. (..)1965 Forest of the Hanged