Space warfare is a main theme and central setting of science fiction that can trace its roots back to classical times, and to the "future war" novels of the 19th century. With the modern age, directly with franchises as Star Wars and Star Trek, it is considered one of the most popular general sub-genres and themes of science fiction. An interplanetary, or more often an interstellar or intergalactic war, has become a staple plot device. Space warfare has a predominant role, it is a central theme and at the same time it is considered parent, overlapping genre of space opera and space Western.
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