Are Total War and Siege a Good War Tactic?

I think that using siege and total war is a good millitary tactic because it is a war and the civillians have to face the consequences. In other wars many civillians died. It is a war and these tactics are good idea for trying to win the war. These tactics gave the Confederate army trouble defending Vicksburg. The point of the battle was to keep America together and if this is what they had to do then you got to do it.