Right that’s what I have been wondering
<span>The three most important empires were Ghana, Mali, and Songhai Empire.<span>The Ghana Empire - was located in south of the Sahara desert and northwest of the Niger River in what is now Mauritania and Mali that lasted from the 6th to the 13th century CE.The Mali Empire - empire that lasted from 12th to 16th century. It was the largest empire in West Africa and with its profound cultural influences on West Africa it allows its language, laws and customs to spread along the Niger River.The Songhai Empire - a state that dominated in the 15th and 16th century. It was one of the largest kingdom in African history. Located on the middle reaches of the Niger River in what is now central Mali and extending west to the Atlantic coast and east into Niger and Nigeria.</span>
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The 1920s in the United States, in the years leading up to the great crash of 1929, were a period of rapid economic development, brought about in many ways by mass production during and after World War I. A rebirth of advertising allowed more of these goods to be purchased, which greatly increased US GDP.
1) The word "vassal" was mostly used for the knights who were responsible for providing the military defense for the king - the answer is "perform military service"
2) Magna Carta is known as the first document to limit the power of the king ! (3rd option)
3) this was the Holy Roman Empire, which was actually an association of independent states.
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