What EVENT led to the arrival of the goths in roman lands?

Answer 1

The Goths wanted to escape from the Huns. They came under attack by the Huns who were expanding into their homeland (Ukraine) and then also invaded Eastern Europe. In 375 a Gothic group, the Visigoths (Goths of the west), asked the Romans for permission to settle in Roman province of Moesia to escape from the Huns. This was in the lower river Danube area of the Roman Empire (in present day Bulgaria). It was the area of this empire which was closest to them. The emperor Valens allowed them to settle there 376. The Visigoths became allies of the Romans, but at times they disagreed with them and fought them.

The other Goths stayed behind, were defeated by the Huns and came under their domination.

A group made up of some Goths, Alans and Huns from the Huns' new heartland in the Hungarian plains east of the mid-course of the Danube invaded the Roman province of Pannonia. This was on the other side of the banks of his part of this river (roughly modern western Hungary). In 380 the emperor Gratian allowed them to settle there as allies. They then protected Pannonia for invasions. These Goths came to be called the Ostrogoths (Goths of the east). After fall of the Empire of the Huns in 451, other Ostrogoths who had remained under the domination of the Huns joined them in this province of the Roman Empire.

Answer 2

It was the invasion of eastern Europe by the Huns. The Visigoths (Goths of the west) asked the emperor Valens to allow them to settle in the lower Danube area of the Roman Empire to escape the Huns and he granted this.