Strictly speaking, the Three Kingdoms period is divided into two parts. From A.D. 190, Dong Zhuo led an army into Luoyang, abolished Liu Bian, a little emperor of Han Dynasty, and established Liu Xie, the emperor of Han Dynasty. By A.D. 220, Cao Pi, the emperor of Wei, forced Liu Xie, the emperor of Han Dynasty, to establish the State of Wei. From AD 220 to AD 280, Wudong was destroyed in the West Jin Dynasty, which was the Three Kingdoms period.
The reason why the former Three Kingdoms period is also classified into the Three Kingdoms period is mainly because since Dong Zhuo entered Beijing to abolish the emperor and establish the emperor, the Eastern Han court has existed in name only, the regime has fallen into the hands of warlords, and the whole country has fallen into a situation of warlord melee. Poor Liu Xie, Emperor Xian of the Han Dynasty, never really mastered the power of state affairs for a day from his accession to the throne to his Zen position. He has always been a doll and tool in other people's hands.
The last years of the Eastern Han Dynasty was the darkest and most decadent stage of the Han Dynasty. Eunuch forces, consorts forces and gentry forces killed each other, and it was dark. In the end, various warlords gained the upper hand. Therefore, the Three Kingdoms period is a dark era, an era of suffering and an era of heroes. Cao Cao, Liu Bei, Sun Quan, Zhuge Liang, Zhou Yu, etc. are all heroes who emerged in that troubled times.
Although the Three Kingdoms period was not long, the historical records were relatively detailed and rich, leaving many well-known historical stories and allusions in China. This is mainly because our ancestors left two historical masterpieces, The History of the Three Kingdoms and The Romance of the Three Kingdoms, especially The Romance of the Three Kingdoms, which described the main historical events and main figures in the Three Kingdoms period in the form of novels, has become a household name.