The battle that led to the down fall of is known as "The siege of Constantinople". Constantinople was the capital city of the Byzantine Empire and one it was one of the most heavily fortified cities in the world in 1453. This battle after ten centuries of wars, defeats, and victories marked the end for the Byzantine Empire when Constantinople fell to the Ottoman Turks. It is said that Constantinople held out only because of its supposedly impregnable walls. The city was finally captured as the Ottoman Turks poured into the city through one of the gates that was forced (some claimed that it had been unlocked).
Fear of overthrow--European leaders were fearful they would be next in a liberal overthrow and banded together to protect the interests of their monarchies.
Klemens von Metternich of Austria convened the Congress of Vienna where he created a plan to protect the monarchies of Europe. Through alliances they all agreed to protect and defend each other if a revolution occurred in their country.
I eat bananas grown in Ecuador
And 1540s, the Spanish Crown divided the American empire into two immense regions, known as viceroyalties, each ruled by a viceroy appointed by the king. The viceroyalty of New Spain consisted of Mexico, Central America, and the Caribbean islands.
Yes, what that person said before me !