Which group did cyrus the great overthrow when he founded the persian empire?
egyptians
medes
greeks
babylonians me asa

It is actually b not d. The answer b which is medes that's the answer

in 1862, president lincoln's emancipation proclamation opened the door for african americans to enlist in the union army. although many had wanted to join the war effort earlier, they were prohibited from enlisting by a federal law dating back to 1792.

explanation:

map scale refers to the relationship (or ratio) between distance on a map and the corresponding distance on the ground. for example, on a 1: 100000 scale map, 1cm on the map equals 1km on the ground.