This may sound strange to your ears, but contrary to what is sometimes taught or suggested, we have no specific New Testament mandate to teach or disciple nations themselves. I say this, even though The Great Commission in Matt. 28:19-20 may appear to be instructing us to do just that.
…Rather than being a command to influence nations with the principles and truths of God’s kingdom, the logic of the command in Matt. 28:19-20 is to make disciples from every nation. Then, as ambassadors of God’s kingdom, these disciples are able to influence all aspects of society, and God willing, perhaps disciple whole nations.
For more on this go to Restore the Word, The Great Commission