Who joined paul and barnabas on their first missionary journey?

Barnabas appears to have been the leader of the first missionary journey. There are several reasons for believing this.

1. Barnabas originally took on a mentoring role, seeking out Paul and bringing him to Antioch before.

2. Luke gives Barnabbas primacy in listing at the beginning of the mission trip (Acts 13) and only later moves to placing Paul first.

3. The mission trip started by going to Cyprus, which was the homeland of Barnabas. Only after that, did they go to Asia Minor, the homeland of Paul.

4. The people in the city of Lystra believed that Barnabas was the leader of the team. According to Acts 14: 11-12, "When the crowd saw what Paul had done, they yelled out in the language of Lycaonia, 'The gods have turned into humans and have come down to us!' The people then gave Barnabas the name Zeus, and they gave Paul the name Hermes, because he did the talking." So the people saw Barnabas as Zeus, the leader of the gods, and Paul as Hermes, the spokesman of the gods.

While we (rightly) give great credit to Paul as a great missionary, it seems as if Barnabas may have been the one that developed the method of missions that was used by Paul and Barnabas on the first trip, Paul on the 2nd and 3rd trips, and (presumably) Barnabas and John Mark on their 2nd trip.