5. What other factors impacted Europe's population at this time? O They were being killed off by Vikings and Vandais
They were fighting a world war.
They experienced a Great Famine after the climate became cooler
They were raiding neighbor's farms to steal crops.

geography

this is because warmer climates often don't get people sick from the flu and regions where it was often colder more people received the flu. hope this if you need more reasoning i am here to

the appointment of gov officials

no reinforcements were used by union forces, thinking they weren't needed.

the north had thought, going into the civil war, that victory would be relatively easy to achieve.   according to the history channel, the outcome of the battle (a victory for the south) "sent northerners--who had expected a quick, decisive victory--reeling."  

the first battle of bull run is called the first battle of manassas by southerners, after the city near where it was fought.   the battle took place in   virginia in july of 1861.   the confederate forces received reinforcements during the battle and that them in achieving the victory.