In his most famous piece of work, The Prince, Niccolò Machiavelli basically wrote a manual on the types of existing principalities, poiniting out the difference between each of them, on the foundations of power and, finally, on the norms of conduct that the one who aspires to be prince must adopt.
According to the author, it was not enough to achieve power; the prince should be able to keep it, and to do so, he would have to be respected by the people, acting accordingly to each circumstance, changing strategies as appropriate. The most famous saying that synthesizes the Machiavellian though is "The ends justify the means", which means that in order to remain in the custody of power (which would be the "end"), the prince is authorized to act in the most convenient manner, not necessarily needing to stick to rigid moral principles and ethical norms.
The characteristics that most of the universities in Europe had that found them attractive to scientific scholars during the Scientific Revolution was that they became independent of the Church. In addition, the authority of churches in most universities gets removed thus more scholars were educated.
Adulis became an important trade center because it rose to be the main port for trade between the Mediterranean and the Indian ocean on the African coast of the Red sea.
It was the main port town of the Aksumite Empire and one of the most prominent Red sea ports during the Roman and Byzantine periods.
Exported products from Adulis included ivory, obsidian, rhinoceros horns and tortoise shells, as well textiles from Egypt and the East, glass from Judea, metals from India, oil and wine from Italy and Syria.
Answer: The Bonus Army was expelled.