10 points plz plz plz what were the problems faced by england after the fall of the roman empire

After the fall of Roman Empire there were basically no more

-Roman Armies 
-Tax Collectors 
-Emperor

The remaining after the fall were the

-Infrastructure
-Language (Latin remained the language of the uneducated until modern day) 
-The Church (still present today)
-And of course the people  
 

I couldn't really find any problems though sorry about that Hope this much is enough:)

River valleys were good places for hunting and fishing.