Paul was ...
...Born a Roman Citizen, if I recall. But others had swords also, and for that reason alone, I'm sure that other Apostles were Citizens. For only Citizens carried swords.
Peter, for example.
ACTS 22:27 Then the chief captain came, and said unto him, Tell me, art thou a Roman? He said, Yea.
ACTS 22:28 And the chief captain answered, With a great sum obtained I this freedom. And Paul said, But I was free born.
Some had to pay to become Citizens, and they also took a public oath of allegiance to Rome. I believe that freeborn Citizens also took the oath at the age of majority.
GAL 4:25 For this Agar is mount Sinai in Arabia, and answereth to Jerusalem which now is, and is in bondage with her children.
MT 24:43 But know this, that if the goodman of the house had known in what watch the thief would come, he would have watched, and would not have suffered his house to be broken up.
As opposed to the bad man that does nothing?
AMOS 6:3 Ye that put far away the evil day, and cause the seat of violence to come near;