The Plague :
- killed thousands of people
- reduced numbers of the laborers which led to a decrease in agriculture and trade
- decrease in soldiers
- lead to more disease

Military Problems :
- loyalty from troops
- barbarians had more money
- paying these soldiers was hard because the economy was failing and romans had no money
- no protection for empire

Over - Expansion :
- became to large
- over population
- no agriculture to feed people