What made the Western Roman empire vulnerable to invasion from the Goth's?

Correct Answer: It suffered from instability and civil war.

Explanation:

Roamn Empire was in the process of disntegration despite the efforts made by Emperor Constatine and Diocletian inorder to save it. The disntegration finally happened in 395 leading to the disintegration of the Empire into two - Western and Eastern Empire.

As a result of the fact that Western Empire is not economically prosperious as well as the rot in its courts, admistrating system, this led to it being vulnerable to invasion by the Goth (Germanic tribes).