Americans of German-descent top the list of U.S. ethnic groups, followed by Irish, 35.8 million; Mexican, 31.8 million; English, 27.4 million; and Italian, 17.6 million, analysis of Census and American Community Survey data shows.mid the surge of Hispanics, the largest ethnic group in the U.S. is still German-Americans, with a population of 49.8 million, a jump of 6 million between 2000 and 2010.
Great Wall History. The history of the Great Wall is said to have started from the Spring and Autumn Period (770 - 476 BC). Over the following 2,000 years, more than 20 states and dynasties played a part in its construction. The accumulative length of the wall exceeds 31,069 miles (50,000 km). Zhou Dynasty (1046 - 256 BC)
Qin Dynasty Great Wall. The Great Wall of the Qin Dynasty (221BC-207 BC) was built during the reign of Emperor Qin Shi Huang, along the country's northern border to prevent the invasion of Huns. In 221BC, Emperor Qin Shi Huang unified China for the first time after annexing six states.