A group of church leaders met in Jerusalem to discuss whether or not Gentiles had to keep the Old Testament law in order to be saved.  Peter, Paul, Barnabas, and James took turns emphasizing that salvation is received through faith, without mixing in any human works.  That truth was put in a letter to the Gentiles. With them went two leaders from the church in Jerusalem named Judas Barsabas and Silas.  And when that letter was received in Antioch, a potential church split was avoided.