Help me find it Please

the movie is about movie about 3 soldiers left behind and they wait for germans to kill eventually one german enter the house and they dont see him the germans sais to him to kneel down but one of the soldier threw a little knife and hit the german the movie is in hbo go and its like 50 minutes

they dont talk too much in the movie they are mind talking

i think all 3 soldier read one book and the talk from the book