California it’s wrong but I need some points
"Fealty" also referred to the duties incumbent upon a vassal that were owed to the lord, which consisted of service and aid. One part of the oath of fealty included swearing to always remain faithful to the lord. ... Fealty and homage were key elements of European feudalism.
Constantinople fought and defeated all invasion attempts made before 1453, but these constant fighting made Constantinople very weak internally. Later in the year 1453, the Ottoman Turks were able to capture Constantinople because it had already become weak.The city was also weakened by the constant infighting of the people belonging to the religion of Christianity. They also neglected the Muslims of Jerusalem. So it can perfectly judged that there was not a single reason behind the falling of Constantinople, but there were several facrors that worked together resulting in the downfall of Constantinople.
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One development that helped lead to the Scientific Revolution was the growth of humanism during the Renaissance. ... All of these developments—the interest in ancient Greek writings, the growth of humanism, the experiments of alchemists—came together in the early 1500s to bring about the Scientific Revolution.
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