How did the work of samuel morse advance in photography combine to turn the civil war into a modern war

The telegrapgh (Samuel Morse's invention) and the advances in photography were both important to help turn the civil war into a modern war for two main reasons:

yes, there are senators in each state

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: