'Barracks' in the Bible
Some of the crowd shouted this and some that. Since the tribune couldn't learn the facts due to the confusion, he ordered Paul to be taken into the barracks.
Just as Paul was about to be taken into the barracks, he asked the tribune, "May I say something to you?"
the tribune ordered Paul to be taken into the barracks and told the soldiers to beat and question him in order to find out why the people were yelling at him like this.
The quarrel was becoming violent, and the tribune was afraid that they would tear Paul to pieces. So he ordered the soldiers to go down, take him away from them by force, and bring him into the barracks.
But the son of Paul's sister heard about the ambush, so he came and got into the barracks and told Paul.
The next day, they let the horsemen ride with Paul while they returned to their barracks.