How you believe the yellow fever epidemic started?

I believe the epidemic of yellow fever started because lack of sanitation and poor medical care. People did not know correct sanitation issues and they had not yet discovered germs and how they spread. The doctors were not so great (don't get me wrong sometimes they helped). Doctors did not have right tools and medicine to cure patients.

Hope this will help someone! ;)

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:

explanation:

i think it is in quadrant 4.

the five year plans were part of a command economy. there was little choice in what would be emphasized for the current 5 year period.

the answer to democracy or totalitarianism is a bit harder. in stalin's time, russia was totalitarian. now that's not entirely true. putin has moved towards at least the boundary.