The Goths were a large Germanic tribe who immigrated from Scandinavia to Eastern Europe. There were two groups of the Goths: the Eastern Goths (aka the Ostrogoths) and the Western Goths (aka the Visigoths).
When the Visigoths were immigrating to Eastern Europe, they crossed the Danube River. At the Danube River, they asked the ruler for permission to settle down in Eastern Europe. The ruler told them that they could settle down and take over enough territory to sustain themselves.
After a while, a famine arose in the land of Rome. Therefore, the Romans plundered the Visigoths for their food. Because of this outrageous action, the Visigoths plundered the Romans for six years. At last they fought a battle in 378 AD. Alaric I won this battle against Rome and from then on, he became the Visigoths’ leader.
After the Visigoths had defeated Rome, the Muslims pressured the Visigoths. The Muslims fought the Visigoths in 718 AD and defeated them. That defeat was the end of the Visigoth Empire.
The Visigoths’ religion was Pagan, which later changed into Christianity as they settled down. When the Visigoths believed in Paganism, they were on a rampage to expand their territory, but when the Visigoths believed in Christianity, they peacefully settled down. The Gothic language was specifically written so that the Bible could be translated into Gothic, that more of the Visigoths might believe in Christianity.
The Gothic empire was a large one when it lasted, but it did not last long.