|Centuries:||7th century – 8th century – 9th century|
|Decades:||670s 680s 690s – 700s – 710s 720s 730s|
|Years:||701 702 703 – 704 – 705 706 707|
|704 by topic|
|State leaders – Sovereign states|
|Birth and death categories|
|Births – Deaths|
|Establishment and disestablishment categories|
|Establishments – Disestablishments|
|Ab urbe condita||1457|
|Bahá'í calendar||−1140 – −1139|
|English Regnal year||N/A|
|Chinese calendar||癸卯年 (Water Rabbit)
3400 or 3340
— to —
甲辰年 (Wood Dragon)
3401 or 3341
|- Vikram Samvat||760–761|
|- Shaka Samvat||626–627|
|- Kali Yuga||3805–3806|
|Igbo calendar||−296 – −295|
|Japanese calendar||Taihō 4 / Keiun 1
|Minguo calendar||1208 before ROC
|Thai solar calendar||1247|
|Wikimedia Commons has media related to 704.|
Year 704 (DCCIV) was a leap year starting on Tuesday (link will display the full calendar) of the Julian calendar. The denomination 704 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
- After spending nearly a decade with the Khazars (a Turkic tribe which control a Steppe empire) the deposed emperor Justinian II flees from his exile at Cherson (Crimea). He escapes with help from Busir, ruler (khagan) of the Khazars, who marries him his sister Theodora.
- Autumn – Emperor Tiberios III tries to bribe Busir and dispatches two Khazar officials, Papatzys and Balgitzin, to kill Justinian. Warned by his wife, he flees to the Bulgar Khanate, securing the assistance of the Bulgarian ruler Tervel in exchange for financial considerations.
- Arab–Byzantine War: An Byzantine expeditionary force under Heraclius (brother of Tiberios III) defeat and destroy an Umayyad army (10,000 men) at Sisium (modern Turkey), killing most and leading the rest off in chains to Constantinople.
- King Æthelred I abdicates the throne after a 30-year reign and becomes an abbot at Bardney (Lincolnshire). He is succeeded by his nephew Cenred (Coenred), a son of the late king Wulfhere, who becomes ruler of Mercia.
- December 14 – King Aldfrith of Northumbria dies after a 20-year reign. His throne is seized by Eadwulf I, of unknown descent. Wilfrid travels to Driffield to support Eadwulf, but his advances are rejected (approximate date).
- Arab conquest of Armenia: The Muslim-Arabs under Abdallah ibn Abd al-Malik (a son of caliph Abd al-Malik ibn Marwan) invade Armenia and subdue the anti-Arab revolt along with his uncle Muhammad ibn Marwan.
- Winter – Abdallah ibn Abd al-Malik is recalled from Armenia to serve as governor of Egypt. He requires that government business be done in Arabic instead of Coptic. His tenure is marred by famine and corruption.
- Emperor Tridu Songtsen dies in battle and is succeeded by his mother Khri ma lod who becomes de facto ruler of the Tibetan Empire. She begins a massive expansion into the Tarim Basin and Northern China.
- Cui Hao, Chinese poet (d. 754)
- Fujiwara no Toyonari, Japanese statesman (d. 765)
- Hyecho, Korean Buddhist monk (d. 787)
- Ibn Ishaq, Arab historian and hagiographer
- Li Fuguo, Chinese official (d. 762)
- Me Agtsom, emperor of Tibet (d. 755)
- Adomnán, Irish abbot and hagiographer
- December 14 – Aldfrith, king of Northumbria (or 705)
- Tridu Songtsen, emperor of Tibet (b. 670)
- For the identification as a lion, see Gannon, pp. 125–127
- John V.A. Fine Jr (1991). "The Early Medieval Balkans". A Critical Survey from the Sixth to the Late Twelfth Century. Chapter 3: "The Balkans in the Eighth Century". Tervel and Byzantium (p. 74). ISBN 978-0472-08149-3
- Venning, Timothy, ed. (2006). A Chronology of the Byzantine Empire. Palgrave Macmillan. p. 189. ISBN 1-4039-1774-4.
- Treadgold, Warren T. (1997), A History of the Byzantine State and Society, Stanford, CA: Stanford University Press, pp. 339–340, ISBN 0-8047-2630-2
- Treadgold, Warren T. (1997), A History of the Byzantine State and Society, Stanford, CA: Stanford University Press, p. 339, ISBN 0-8047-2630-2