Why didn’t the Guanlong Group stop Yang Jian from usurping the throne and massacring the Yuwen royal family?

When Yang Jian usurped the throne, the nobles of the Guanlong Group were already on Yang Jian's side. Of course, there are also some people who are unconvinced, such as Yuchi Jiong. But after Yuchijiong was destroyed, the Guanlong Group had no reason to oppose Yang Jian. Either he performed a meritorious service or he didn't express his position. In short, Yang Jian's attempt to usurp the throne was recognized. The only thing left was how to deal with the Yuwen royal family.

So when he massacred the royal family, it was impossible for anyone to stand up and object. After all, there would be bloodshed on the way to seize power. Yuwen was destined to abdicate, and Yang Jian was destined to proclaim himself the emperor and found the country.

Many people think that Yang Jian has no strength. This is a wrong view. Yang Jian's family is very powerful. Yang Jian has the army left by his father and can recruit some remaining forces. As the opponent, the Yuwen family only has imperial power but no strength. This does not mean that as a king, he has no strength, but that he must master the imperial power in order to exert this strength.

As soon as the late emperor died, some ministers falsely passed on the imperial edict and handed over the important task of assisting the country to Yang Jian, and the imperial power also fell into Yang Jian's hands. The Yuwen family had nothing left in their hands. The Yuwen family actually has one last chance to make a comeback, as long as they can regain the imperial power. But they didn't grasp it.

The most united time in the Northern Zhou Dynasty was Yuwentai. At that time, Yuwentai was the true founder of the twelve generals of the Guanlong Group. During Yuwentai's period, the Guanlong Group was the most united, and their interests were also the most united. The most unanimous, they all unite closely around Yuwentai. This unity was compromised after Yuwentai's death, and Yuwentai's sons established the Northern Zhou Dynasty.

The Yuwen family became the royal family, which to a certain extent put the Guanlong Group and the Yuwen family on opposite sides. The development of imperial power and the Guanlong Group's control of the country could not be consistent.