Perhaps the greatest contribution of Grant and Sherman (Grant being the leader of the Northern forces) was that they knew when not to fight--that is when to hold back--since the North's army greatly outnumbered that of the South.
Biased information can be found in almost anything, but is usually found in newspaper editorials, online blogs and forums, magazines, and opinion based pieces. However, when reading any kind of story/article, an author's opinions will generally show as it is virtually impossible to stay completely unbiased.
He was an American pioneer, explorer, woodsman, and frontiersman. He led a expedition that discovered a trail to the west through the Cumberland gap