Amajor contribution of the byzantine empire was the

HI Brainiac

Was the preservation of Greco-Roman heritage

I hope that's help:0 

relied on paying foreign soldiers for its army

Explanation:

i got it right

what are local authorities doing to fix the problem

explanation:

these the citzens and goverment come to terms some of the amendments gave the states more power then the goverment and some protocted americans rights