The cause of the decline of the Roman Empire.

 The Germanic movement, but the Germanic movement was due to the Huns. The Huns are the same group as the Mongolians, larger than the Mongolians, better at using swords than bows, and are characterized by 100 percent cavalry. It is said that four Germans managed to handle only one Hunjok, which shows a huge difference. At that time, the Hun population remained about 30,000 out of 90,000 people, excluding the elderly and children, about 20,000 of them fought against the Germans at the time, and at that time, the Germans were growing and soldiers alone reached 130,000, of which 30,000 were working as Roman mercenaries and the rest were almost gangsters. The fight between 100,000 gangsters and 20,000 elite regular soldiers ends with the Huns' victory, and the Germans take the remaining soldiers and their families into Rome, so did the Roman army and the Huns not fight?  At that time, the king of the Huns was very young, but he died due to illness and went back early, so the battle did not take place, but according to Yasa, the Roman regional commander was furious with the loot of a city outside Rome and was annihilated. The most important thing is the fall of the Huns, who had a confrontation with the Tangut at the time, robbed the empty houses and destroyed all the families of the Huns when the Huns fought the Germans, and the king died and they were busy running.