The United Pentecostal Church International (UPCI) is a Christian denomination that emphasizes the importance of the Holy Spirit and the experience of being "born again." Founded in 1945, it is known for its belief in the oneness of God, rejecting the traditional concept of the Trinity. The UPCI promotes baptism by immersion in the name of Jesus Christ and encourages a lifestyle of holiness among its members. With headquarters in Hazelwood, Missouri, the UPCI has grown to include thousands of congregations worldwide. The church focuses on evangelism, education, and community service, aiming to spread its message and support its members in their spiritual journeys.