Which of the following factors contributed most to the expansion of both the persian and greek empires

Military Conquest. I just checked and thats right

congress failed to remove johnson. but it did succeed in getting control of efforts to re-build the south following america's civil war. radical republicans wanted to punish the south for starting the war. they also wanted to be sure new governments in the southern states would support the republican party.

a. favoring native born americans over immigrants.