What were the siege of vicksburg and the battle of gettysburg? what effects did they have on the progress of the war?

Vicksburg effects: The Battle of Vicksburg effected the Civil War because the Union got full control of the Mississippi river therefore taking over and shutting down the confederates trade, transportation, and military/fortifications.

answer: the time zones used to be whatever the local authority wanted them to be. one town might have 6am whenever the sun came up and another town had 6am 10 minutes later.  

the trains had a hard time when their orders said to be at a certain point at 6am.  

6am, but who's 6am.  

the railroads got together and set the time zones more or less along the longitude lines across the country.

explanation:

a memoir is the correct answer