Seek the chronology of the events of the Qin State from 259 BC .

A calendar is a publication that is used on a daily basis to record relevant information such as dates. Each page that displays information for one day is called a calendar, each page that displays information for a month is called a calendar, and each page that displays information for the whole year is called a calendar. There are many forms, such as wall calendars, desk calendars, annual calendar cards, etc., and now there are electronic calendars.

The year of Jesus' birth is defined as the first year of the Common Era. How many years BC was before and how many years AD after that.

Qin Shi Huang is BC, so the year is getting smaller and smaller. The year is 2012 AD.

The Common Era is the year of Jesus' birth, which means that Qin Shi Huang was between 259 and 210 years before Jesus was born... Qin Shi Huang seems to be fifty years old, and Zhao Kuangyin is also fifty years old...

The Western approach to definition. The year of Jesus' birth is defined as the first year of the Common Era. How many years BC was before and how many years AD after that. It's the same as the number line.

BC is equivalent to negative.

From 230 B.C. to 221 B.C., it took 10 years for the Qin State to destroy the six states of Yan and Zhao in the north, Han and Wei in the Central Plains, Qi in the east and Chu in the south, ending the war and chaos of the princes for more than 500 years, and establishing the first centralized state in Chinese history.

During the Warring States Period, after a long period of wars between the princes, the pattern of the rise and fall of the princely states has changed greatly, and many weak and small countries have been eliminated, and only seven large vassal states of Qi, Chu, Yan, Han, Zhao, Wei and Qin are left in China, known as the Seven Heroes of the Warring States Period. The formation of the Seven Heroes situation is not only the result of the annexation war since the age, but also the prelude to the unity of China. In order to enhance the national strength, the same country, the Seven Heroes successively carried out the reform activities of enriching the country and strengthening the army.

Wei used Li Kui's reforms, Chu used Wu Qi's reforms, and Zhao reformed Wulingwang, but the most effective was Qin's Shang'an reforms. In 359 B.C., Qin Xiaogong appointed Shang Ying, changed the law and reformed, and the national strength gradually became stronger. In the more than 100 years from Qin Xiaogong to Qin Wangzheng, Qin's national strength became stronger, and in terms of military system, it implemented conscription according to counties and counties, improved the organization of the army, improved the combat effectiveness of the army, and the soldiers were brave and brave, and the chariots and horses were majestic, which was far from comparable with the other six countries.

In terms of military strategy, he changed the strategy of laborers going on expeditions and often losing them, and adopted the strategy of Fan Sui's long-distance and close attacks, gradually encroaching on and consolidating the areas he occupied, and implementing effective occupation. The Qin State successively destroyed the Western Zhou and Eastern Zhou dynasties, conquered the areas east and south of the Yellow River in Korea, and set up three counties, Taiyuan, Shangdang, and Sanchuan, and its territory included most of present-day Shaanxi, central and southern Shanxi, western Henan, western Hubei, northwestern Hunan, and northeastern Sichuan.

Historical records record that the Qin State "has the benefits of Bashu and Hanzhong in the west, the use of raccoon dog and daima in the north, the limit of Wushan and Qianzhong in the south, and the solidity of Cuihan in the east". "A thousand chariots are multiplied, and a million are striking", and the military strength is far superior to that of the other six countries.

The six countries were unified, and the system of three princes and nine secretaries, the county system, and the unified measurement and currency were established