I too was thinking sassafras. Easy way to tell - stick a knife in the bark and smell. If one knows about trees, another help would be to ell us if the tree had simple leaves, compound leaves or what, but you would have to look those terms up. Other clues include the way the branches come off the tree, up, straight out, etc. Another clue is if the branches are opposite each other, alternating or what. That's all part of Tree ID.