What is the Jerusalem council Paul attended in Galatians 2, and when did it happen?

The Jerusalem council in Galatians 2 is the great Jerusalem council of about A.D. 51, parallel to Acts 15. Paul was called up to Jerusalem, where opponents pressured him to back away from his apostleship and embrace Judaism and circumcision along with belief in Christ.

Les explains that Galatians 2:5 follows the account of Paul being called up to Jerusalem. This was the great Jerusalem council of A.D. about 51, which he identifies as a parallel chapter with Acts 15. At this council, men were coming down on Paul to back away from all the claims of his apostleship and to embrace Judaism and circumcision, along with a belief in Christ.

Galatians 2:1

Then fourteen years after I went up again to Jerusalem with Barnabas, and took Titus with me also.

Acts 15:1

And certain men which came down from Judaea taught the brethren, and said, Except ye be circumcised after the manner of Moses, ye cannot be saved.

What happened when Paul returned to Jerusalem after 14 years?

After fourteen years, Paul went up again to Jerusalem with Barnabas and Titus. At the Jerusalem council, he was called on the carpet for preaching salvation to Gentiles. The account points to Acts chapter 15, though the full proceedings are not recounted.