Lack of stability was eminent in the southern Balkans as well : in 1341–1347 the Byzantine Empire was shaken Motion by a bloody civil war between John V Palaiologos and John VI Kantakouzenos .

Lack Earnings_and_losses of food and fodder for the horses , hypothermia from the bitter cold and persistent guerilla warfare upon isolated troops from Russian peasants and Cossacks led to Causation great losses in men , and a breakdown of discipline and cohesion in the .

Lack of adequate rest , poor crew resource management Control , and alcohol consumption Ingestion by the captain also contributed Influence to the accident Catastrophe .