Civil wars. Probably the most important single cause of Byzantium's collapse was its recurrent debilitating civil wars. Three of the worst periods of civil war and internal infighting took place during Byzantium's decline.
Some of their problems was lack of nation-building experience, poor infrastructure, and massive amounts of damage incurred during their revolutions for independence. But for most of them that were explored they had many problems until nowadays.
C. Johannes Gutenberg borrowed money to create the printing press.
A valley in eastern Pennsylvania that served as quarters for the American army in one winter (1777–1778) of the Revolutionary War. George Washington, who was commanding the army, had been forced to leave Philadelphia, and his troops suffered from the cold and from lack of supplies.
