May 31, 1961 is when south africa became independent
Theodosius was the last emperor to rule over both the eastern and the western halves of the Roman Empire. ... He also issued decrees that effectively made Orthodox Nicene Christianity the official state church of the Roman Empire
I'd say the combustion engine, even though it was toyed with in the mid-west during the cowboy era, it wasn't until after the Civil War in which it was a fully effective gasoline powered engine.
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In 1279, Kublai became the first Mongol to rule all of China when he conquered the last of the Song loyalists. ... Despite adopting and improving on many Chinese systems and ideals, Kublai and his Mongols did not want to become Chinese – they kept many of their own customs and remained unassimilated to Chinese life