Yo mama , battle of britain I think??
Generally speaking, "d.Language barriers" were not a problem faced by multi-ethnic countries in Africa after independence, since relative to some of the more serious problems, like genocidal violence, this was not an issue.
Answer: In 1492, a Spanish-based transatlantic maritime expedition led by Italian explorer Christopher Columbus encountered the Americas, continents which were virtually unknown to and outside of the Old World political and economic system. The four voyages of Columbus led to the widespread knowledge that a continent existed west of Europe and east of Asia. This breakthrough in geographical knowledge inaugurated a period of exploration, conquest, colonization, biological exchange, and trans-Atlantic trade, the effects and consequences of which persist to the present, and are sometimes cited as the beginning of the modern era
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