Analysis of events in the history of alternative

In deed Alternate history has imaged different side of past events and is entering the results of this difference to the real world and these results will continue till future. In simple word, Alternate history is the interpretation of historical ifs and buts with the thoughts about the different results of these ifs and buts. Alternate history, change more basic points of history and make a perfectly different interpretation in present. Sometime these interpretations are based on truth, but most of the time they are based on the historian's guess. This point of view, is a practice for noticing to the past analyzing the result of ifs the events and answering to the question of ifs and buts of some main historical events which has differently occurred It is a way for a new or maybe more healing interpretation of historical event's results. Indeed, The Alternate history's followers raise incredible variety of such questions and these questions expand in historical novels or short stories or monograph writings. this viewpoint to history can be the origin of different writing about historical events. This research has investigated some subjects: 1. what is Alternate history? 2. with which names Alternate history is presented? 3. Which subjects are affirmed by Alternate history? 4. What is similarity and difference of Alternate history and other new histories like future history and time travel?