Articles of Confederation. The Articles of Confederation and Perpetual Union was the first constitution of the United States. It was drafted by the Second Continental Congress from mid-1776 through late 1777, and ratification by all 13 states was completed by early 1781.
The Industrial Revolution made machine based manufacturing more common, and increased the population and average income. Instead of farming, people came to cities to work. Women and children worked in factories as well. Those are the effects that changed the United States.
Constantinople was able to fight back against the numerous
invasion attempts before 1453, but with each fight it got weakened. This
resulted in the fall of Constantinople in the year 1453, at the hands of
Ottoman Turks. Constantinople was not only fighting against the Turks, but also
against the fellow Christians. The Turks did not care about the Muslim population
living in Constantinople. Constantinople never grew stronger with the
resistance they put up against the several external aggressors. If that has
been the case, then they would not have been defeated by the Ottoman Turks.
Weapons in WW1 were being mass produced and of a greater quality than those of wars before. Barbed wire, airplanes, poisonous gas, submarines etc were introduced which revolutionized war today. Trench warfare was countered and is no longer used to fight.
