Armstrongism refers to the teachings and doctrines of Herbert W. Armstrong while leader of the Worldwide Church of God (WCG). His teachings are professed by him and his followers to be the restored true Gospel of the Bible. Armstrong said they were revealed to him by God during his study of the Bible. The term Armstrongite is sometimes used to refer to those that follow Armstrong's teachings. Armstrongism and Armstrongite are generally considered derogatory by those to whom it is applied, who prefer to be known as members of the Church of God (COG). These doctrines were also espoused by his sons Richard David Armstrong (until his death in 1958) and Garner Ted Armstrong (until his death in 2003) with slight variations.
Herbert Armstrong's teachings have similarities to those of the Millerites and Church of God (Seventh Day) (sometimes referred to as "COG7" to differentiate it from similarly styled sects named "Church of God" which worship on Sunday and generally hold to traditional Christian teachings), from which WCG is spiritually and organizationally descended. The religion is a blend of Christian fundamentalism, non-belief in the Trinity and some tenets of Judaism and Seventh-Day Sabbath doctrine. Armstrong himself had been a COG7 minister before the Oregon conference stripped him of his ministerial credentials and excommunicated him for his seeking to "water down" and change their long-established COG7 doctrines. It was in the fall of 1937 when Elder Armstrong's credentials were revoked by the Salem Church of God organization. The reason given by the Board of Twelve Oregon Conference of the Church of God, 7th Day (COG7) for this adverse action against Herbert W. Armstrong, was because he taught and kept the annual Feast days. But the real reason seems to have been because of his uncooperative attitude. Armstrong then began his own ministry.
