In 221 BC, Ying Zheng accomplished his objective and established China's first feudal and centralized empire. The Qin Dynasty was what we called it (221 BC - 206 BC). Ying Zheng declared himself Qin Shi Huang, the first emperor of a united China. Qin Shi Huang, on the other hand, destroyed neighboring nations one by one, swallowing their territory into his expanding empire and enslaving and castrating their people. "He castrated people from other countries every time he seized them in order to mark them and turn them into slaves," explains Xun Zhou of Hong Kong University.
Although this isn't quite confirmed, it is considered that Germanic wars are the longest-lasting wars in history. They lasted for 800 years, starting from 220 BCE until 580 AD, and were fought between Romans and various Germanic tribes. However, if you need a war in the newer history, the second longest war is known as Reconquista, which is a war fought between Christian Kingdoms and the Muslim Moors, and lasted for about 770 years.
The answer would be The Atomic Bomb.
Economists use changes in <em><u>GDP to measure the state of a country's economy.</u></em> The gross domestic product, also known as GDP, is a tool that economists around the world use to measure how the economy of a specific country is doing. They use this tool, because it represents the value in american dollars, of all the services and goods that a country produced during a specific amount of time. This number gives an estimation on how big or small the country's economy is.
