What were some factors that made the vietnam war such a difficult war to fight for american soldiers and why did america struggle to gain the support of the people south vietnam

i got one, the Vietnamese knew the terrain better.

i think option 3. would be ur best bet and u need to write it urself

have a good day

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: