On 23 January 1932, the first definitive frontier treaty between Turkey and Iran was signed in Tehran. The border between Turkey and Iran is one of the oldest in the world and has stayed more or less the same since the Battle of Chaldiran in 1514, and the Treaty of Zuhab. The 1932 treaty thus formalized a centuries-old status quo. On the same day, the countries signed a new Treaty of Friendship, as well as a Treaty of Conciliation, Judicial Settlement and Arbitration.