Why were these  chosen?
The great missionary Paul summed up his ministry with these words, "It has always been my ambition to preach the gospel where Christ was not known" (Romans 15:20). Paul’s ambition reveals the true heart of missions, to advance the knowledge of God's glory, the story of his good news, to every dark corner of the earth. The mission of the church will not be complete until all peoples have access to the gospel of Jesus Christ.
We chose the Priority 15 with this strategic understanding in mind. After much prayer, research, and dialogue with existing missionaries, the places we chose are not only unreached with the gospel, they are not likely to be reached in the near future. Most are located in politically unstable areas with religious barriers including active persecution of Christians and harsh physical living conditions. We need humility and faith, trusting that God will use us in our weakness to break through these areas of spiritual darkness.