What was zheng he's most important accomplishment

Match the events to the impact they had on africa during the late 19th century 1.colonization of the congo 2.berlin conference of 1884 3.berlin act of 1885 settled tutorial disputes between european nations prohibited the slave trade in africa marks the beginning of scramble for africa

Which russian tsar transformed thr royal residence in st. petersburg, the hermitage, into a center of culture, painting, and the performing arts

Which best describes the impact of the crusades on european exploration?