URGENT -if you answer correctly ill give you brainliest which will give you 33pts-

attacks by the seljuk. a devastating blow to the entire byzantine world was dealt by christian crusaders from the west. the venetians were eager to destroy byzantine power and offered the crusaders money, ships, and part of the spoils of war.

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less available tax revenue

this basically means that when they get money from taxes wirth having a lower gdp they get less then what others have with a higher gdp

roman empire and mayas