After Jesus read God’s book sealed with seven seals, (Revelation 5:9) he learned that he had to appoint the Olive Tree as his successor. He gave John the Apostle visions to let the Seven Churches know what must happen (Revelation 1:1). He mentions the covenant related to the Overcomer to each of the Seven Churches (Revelation 2:7 & etc.) However, the messsage is not for just one church. The Overcomer’s covenant is a message from the Holy Spirit to the “Churches.” (Revelation 2:7 & etc.) That is, Jesus wanted to pick the Olive Tree from all those who receive the Holy Spirit.
What does it mean to overcome? It means to overcome a test. The test is done by Jesus, so it does not signify overcoming the Devil. Jesus sets the standards for the test, so no one can say anything about the test. According to what Jesus said directly to Lee Young-soo the Overcomer, He chose the first Olive Tree for his “passion” and the second for his “abiding attitude to serve the Lord.”
The first Olive Tree was appointed in 1951, so does this imply that no one before him had the passion? Probably not. However, the Olive Tree was not to be appointed at just any point in time. And since he is to complete God’s army, he is prophesized to appear during the final days. Thus, the Overcomer can only be appointed during those days. Those days are the present.
Then, how was the Overcomer appointed in Korea? It is because of its history of martyrdom. After Christianity spread in Korea, about 10,000 Catholics and 7,000 Protestants were martyred. So when Jesus searched where to appoint the Olive Tree, Korea had the most number of martyrs.