What was the greatest obstacle that the Union army faced at Vicksburg, and how did they overcome it?

Question

I read so much on this ...were hills, surrounded by flooded marshlands & waters..army couldn't get through by foot..can't find a full explanation of this & how did they overcome it...no where to be found..I have to write a small paragraph on this...impossible !

Answer 1

You can organize information like this in a geographical pattern to make better sense. What did the Union army face first? What next? What next? and so on...

Here are some websites that may help:
http://www.historynet.com/americas-civil-war-digging-to-victory-at-vicksburg.htm

and a few here: http://www.google.com/#hl=en&sugexp=ldymls&xhr=t&q=union+army+problems+vicksburg&cp=29&qe=dW5pb24gYXJteSBwcm9ibGVtcyB2aWNrc2J1cmc&qesig=QtdAapJ3DVvftucKd29dvg&pkc=AFgZ2tllGbZmE9uDw9O4AnqWYV3HuShgdibramCrKchwq1nKkudUDwjS3_KcSt9UWLZpFLP0T3EEjqXVF5VXf4uOp6eCSy-Z2Q&pf=p&sclient=psy&source=hp&aq=f&aqi=&aql=&oq=union+army+problems+vicksburg&pbx=1&bav=on.2,or.r_gc.r_pw.&fp=951dc7972bfd90fb&biw=1169&bih=582