Why Did Rome Fall At The Time

Rome the best empire and powerful place that has ever existed in the world.It lasted for a long century and no one could stop their power even if their were attacked every day they would get outmatched and get defeated easily by the Romans, but the question was how did Rome Empire fall at the time.It's unbelievable because it was the last empire that ruled a lot of places in the world and was one powerful empire that everyone would fear. The three main points were what was the Roman empire,why was the Roman empire powerful and why did rome collapse.
The Roman empire was one of the long lasting empires that ruled a lot of countries in europe at the time and it was one of the top superpowers in the decade everyone was afraid that one day Rome