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)
The Great Wall of China is a Chinese fortification built from 3rd century BC until the beginning of the 17th century, in order to protect the various dynasties from raids by Mongol, Turkic, and other nomadic tribes coming from areas in modern-day Mongolia and Manchuria.alls were being built in order to protect the Chinese empire as early as the 7th century BC. However, the collection of walls which have become known as The Great Wall of China were mainly built from 220 to 206 BC.