historical events may have turned out differently and that there is an alternate timeline of reality. Philip K, Dick’s The Man in the high castle (1962) is an alternate history where the Nazi Germany and the Imperial Japan won World War II. Another example is Isaac Asimov’s short story What If which talks about a couple who can explore alternate realities. 4. Military Science Fiction A science fiction work set in a military background is called a military sci-fi. There are major conflicts between nations