The Battle of Manzikert (Mantzikert) in ancient Armenia in August 1071 CE was one of the greatest defeats suffered by the Byzantine Empire. The victorious Seljuk army captured the Byzantine emperor Romanos IV Diogenes, and, with the empire in disarray as generals squabbled for the throne, nothing could stop them sweeping across Asia Minor. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.