The Battle of Manzikert. August 26,1071.

The Battle of Manzikert occurred on August 26, 1071 between the Byzantine Empire and Seljuk Turkish forces led by Alp Arslan, resulting in the defeat of the Byzantine Empire and the capture of Emperor Romanus IV Diogenes. During the 1060s the Seljuk sultan Alp Arslan allowed his Turkish allies to migrate towards Armenia and Asia Minor, where they sacked cities and plundered farmland. In 1064 they destroyed the Armenian capital at Ani. In 1068 Romanus IV led an expedition against them, but his slow-moving infantry could not catch the speedy Turkish cavalry, although he was able to capture the city of Hierapolis. In 1070 Romanus led a second expedition towards Manzikert, a Byzantine fortress that had been captured by the Seljuks, and offered a treaty with Arslan: ­ Romanus would give back Hi...

The Julian Calendar. January 1, 45 BC.

  In the mid-1st century BCE Julius Caesar invited astronomer Sosigenes of Alexandria to advise him about the reform of the calendar, and Sosigenes decided that the only practical step was to abandon the lunar calendar altogether. Months must be arranged on a seasonal basis, and a tropical (solar) year used, as in the Egyptian calendar, but with its length taken as 365 1/4 days. To remove the immense discrepancy between calendar date and equinox, it was decided that the year known in modern times as 46 BCE should have two intercalations. This insertion amounted to an addition of 67 days, making a year of no less than 445 days and causing the beginning of March 45 BCE in the Roman republican calendar to fall on what is still called January 1 of the Julian calendar. Previous errors havi...

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