John Milton, in a sonnet written during the siege of Colchester, called upon the Lord General to settle the kingdom, but the crisis was now at hand. Fairfax was in agreement with Cromwell and the army leaders in demanding the punishment of Charles, and he was still the effective head of the army. He approved, if he did not take an active part in, Pride's Purge (6 December 1648), but on the last and gravest of the questions at issue he set himself in deliberate and open opposition to the policy of the officers. He was placed at the head of the judges who were to try the King, and attended the preliminary sitting of the court, but absented himself after this. The most likely explanation is that when he saw that they were serious about intending to execute the king he declined to have anything to do with this.