Henry J. Sage
Sage American History: Turning Points in the Civil War
Article detailing the turning points of the Civil War, including the battles at Antietam, Gettysburg, Vicksburg, along with the Emancipation Proclamation and Sherman's March. Link to virtual tour of Gettysburg battlefield.
University of Groningen
American History: Outlines: Hungary and Suez Crisis
This site from the University of Groningen summarizes political turning points of 1956, giving detail on the Soviet and American political desires shown in their responses to Israel's attack of Egypt.