Year 867 (DCCCLXVII) was a common year starting on Wednesday of the Julian calendar.
The 820s decade ran from January 1, 820, to December 31, 829.
The 830s decade ran from January 1, 830, to December 31, 839.
The 840s decade ran from January 1, 840, to December 31, 849.
The 850s decade ran from January 1, 850, to December 31, 859.
The 860s decade ran from January 1, 860, to December 31, 869.
The 790s decade ran from January 1, 790, to December 31, 799.
The 910s decade ran from January 1, 910, to December 31, 919.
The 940s decade ran from January 1, 940, to December 31, 949.
The 950s decade ran from January 1, 950, to December 31, 959.
Year 844 (DCCCXLIV) was a leap year starting on Tuesday of the Julian calendar.
Year 788 (DCCLXXXVIII) was a leap year starting on Tuesday of the Julian calendar, the 788th year of the Common Era (CE) and Anno Domini (AD) designations, the 788th year of the 1st millennium, the 88th year of the 8th century, and the 9th year of the 780s decade. The denomination 788 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.
Year 830 (DCCCXXX) was a common year starting on Saturday of the Julian calendar.
Year 865 (DCCCLXV) was a common year starting on Monday of the Julian calendar.
Year 866 (DCCCLXVI) was a common year starting on Tuesday of the Julian calendar.
Year 965 (CMLXV) was a common year starting on Sunday of the Julian calendar.
Year 882 (DCCCLXXXII) was a common year starting on Monday of the Julian calendar.
Year 944 (CMXLIV) was a leap year starting on Monday of the Julian calendar.
The Battle of Lalakaon, or Battle of Poson or Porson, was fought in 863 between the Byzantine Empire and an invading Arab army in Paphlagonia. The Byzantine army was led by Petronas, the uncle of Emperor Michael III, although Arab sources also mention the presence of the Emperor in person. The Arabs were led by the emir of Melitene (Malatya), Umar al-Aqta.
ʿUmar ibn ʿAbdallāh ibn Marwān or ʿAmr ibn ʿUbaydallāh ibn Marwān, surnamed al-Aqtaʾ, and found as Amer or Ambros in Byzantine sources, was the semi-independent Arab emir of Malatya (Melitene) from the 830s until his death in the Battle of Lalakaon on 3 September 863. During this time, he was one of the greatest threats to the Byzantine Empire on its eastern frontier, and became a prominent figure in later Arabic and Turkish epic literature.
