Acts 10:44-48, And while Peter yet spake these words, the Holy Ghost fell on them which heard the word. (45) And they of the circumcision which believed were astonished, as many as came with Peter, because that on the Gentiles also was poured out the gift of the Holy Ghost. (46) For they heard them speak with tongues, and magnify God. Then answered Peter, (47) Can any man forbid water, that these should not be baptized, which have received the Holy Ghost as well as we? (48) And he commanded them to be baptized in the name of the Lord. Then prayed they him to tarry certain days. Acts 11:16, Then remembered I the word of the Lord, how that he said, “John indeed baptized with water; but ye shall be baptized with the Holy Ghost.” (17) Forasmuch then as God gave them the like gift as he did unto us, who believed on the Lord Jesus Christ; what was I that I could withstand God?
Their discovery of the Pentecostal experience shortly lead to converts all over the United States. Pentecostalism received its greatest modern time revival in Los Angeles, California. The revival called the Azusa Street revival ran from 1906-1913. This revival attracted honest hearted Christians seeking the full truth from all over the world.
Though Pentecostal adherents met with much opposition, the phenomenon continued to spread as newly-filled saints and preachers returned to their communities and began to hold meetings.
Many early Pentecostals were opposed to ideas of organization. The movement, in the beginning, had no denominational aspirations but intended to work from inside the various existing denominations. However, it became increasingly clear as opposition to Pentecostalism mounted that it would be necessary to form some organization. To this end, the Assemblies of God began to organize. The Assemblies of God was chartered in 1913.
The Oneness Pentecost movement split from the Assemblies of God in 1914 when many of their ministers, (still focusing on the Book of Acts), noticed that everyone, that was baptized into the early church, were baptized exclusively in the Name of Jesus Christ instead of the titles, (the triune formula adopted at one of the various counsels called by an Emperor or Empress of Rome), of the Father, Son, and Holy Ghost.
This spawned a new focus on the name of Jesus. John Scheppe, who attended the service, spent the night in prayer and Scripture reading and ran through the camp the following morning shouting that he had received a revelation of the power of Jesus name. Frank Ewart, a former Baptist minister who had received the Pentecostal experience in 1908, also gave special heed to the Oneness message. Ewart began a careful and systematic search of the Scriptures, concluding that not only should baptism be administered in the name of the Lord Jesus Christ but that Jesus was indeed the highest revealed name of God. He denounced the Trinity and embraced the pure monotheism of Oneness doctrine as described in the New Testament.
Present statistics estimate that there are over 18 million Oneness Pentecostals worldwide. The Oneness Movement, perhaps more than any other branch of Pentecostalism, has dedicated itself to Apostolic doctrine. Oneness Pentecostals have a great Pentecostal heritage, a history marked by the pioneering spirit of Oneness believers dedicated to the truth and the power of a New Testament theology that truly distinguishes this segment of the Pentecostal Movement.