In fact, this practice is to exchange blood for alliance. The reason for this is to inform the gods of their determination. Moreover, in ancient times, once blood was the alliance, if one party broke the oath or the original agreement, it would definitely be punished by the gods in the end. You know, although the strength of the 18 th Route Warlords at that time was relatively large, they were fragmented after all. Without a sense of form, it is difficult to get these people together.

In fact, the earliest time of blood alliance did not appear in the Three Kingdoms period, but dates back to the Zhou Dynasty. In the Book of Rites, there is such a record. In the Zhou dynasty, if the vassal States met without agreement, what was this phenomenon called? Meet? If the governors agree to meet somewhere, then this phenomenon is called? what's up Between governors, if a slogan can be shouted together, what is this phenomenon called? Swear? If the princes get together and kill animals to sacrifice to the gods, what is this phenomenon called? Hey? . Therefore, it is not surprising that during the Three Kingdoms period, the eighteen-route princes got together and there was a situation of exchanging blood for alliance.

In fact, there are still many small steps to exchange blood for alliance. As we said before, this is also a ceremony to donate blood to the League. Since it is a ceremony, there must be many steps. The first step must be to read the oath, that is, you must first worship God and tell them your determination. The next step is to slaughter animals and sacrifice. The third step is to wipe the blood of animals on the face, as all the people involved in the prince should do.

When the 18th Route Warlords crusaded against Dong Zhuo, although there was a ceremony of exchanging blood for alliance, they could not achieve reunification. In fact, everyone in the 18th Route Warlord has his own ideas, and it is impossible to attack Dong Zhuo wholeheartedly. Although there was such a ceremony, they could not unite these people closely, so the so-called crusade against Dong Zhuo came to an abrupt end.