Complex sentence: Charges are added during the course of the trial for trivial things such as not saying "Sir" to an officer and he is grilled as to the exact timing of when he did not tell Yossarian about his thoughts of the trial.
Split into simpler sentences: Charges are added during the course of the trial for trivial offenses such as not saying "Sir" to an officer. For example, he is grilled as to the exact timing of when he did "not" tell Yossarian about his thoughts on the trial.