Beliefs
In 1054 the eastern and western church split. The Eastern Orthodox Churches teach:

1. Uphold apocrypha, Transubstantiation/Consubstantiation, Infant Baptism
2. Upholds Sacramentalism and Sacerdotalism, justification by faith and works
3. Rejects Papal Infallibility, the Pope as the Vicar of Christ, Immaculate Conception of Mary, the assumption of Mary, doctrine of indulgences, ordination of homosexuals and women.
4. Holds to the perpetual virginity of Mary
5. Lower Clergy can marry
6. Have a rule that they will never read the book of revelation in a public worship service.
7. Condemned chiliasm as heresy in 381AD.
8. Some hold the doctrine of the Monophysites, (that Christ had one nature instead of two)

Eastern Orthodox Denominations:

1. African Orthodox Church, founded 1921
2. Albanian Orthodox Church, founded 1919
3. American Carpatho-Russian Orthodox Church, founded 1938
4. Antiochian Christian Orthodox Archdiocese of North America, founded 1975
5. Bulgarian Eastern Orthodox Church, founded 1938 
6. Greek Orthodox Archdiocese of North America, founded 1922
   Infant baptism by immersion
7. Holy Eastern Orthodox and Apostolic Church in North America, founded 1927
8. Orthodox Church in America (Russian), founded 1794
9. Romanian Orthodox Episcopate of America, founded 1929
10. Serbian Eastern Orthodox Church, founded 1921
11. Ukrainian Orthodox Church of the USA, founded 1924

Monophysite Orthodox

1. Armenian Church, founded 301
   Monophysites, Infant baptism by immersion, 
2. Egyptian Coptic Church, founded
   Monophysites
3. Eritrean Church, founded
   Monophysites
4. Ethiopian Orthodox Church, founded
   Monophysites
5. Malankara Orthodox Syrian Church and Mar Thoma Orthodox Syrian Church (Indian), founded 1978
   Monophysites, in communion with the Anglican Church
6. Syrian Orthodox church of Antioch, founded 1957
   Monophysites

Some of the dates are when the USA branch of the Churches were founded.
Date: 2001