Complex sentence: An ever present element was Whedon's injection of anti-totalitarianism, writing into the show a historical analogy of the Battle of Gettysburg, the "Battle of Serenity Valley"--the Independents were defeated by The Alliance, an authoritarian regime.
Split into simpler sentences: An ever present element was Whedon's injection of anti-totalitarianism, writing into the show a historical analogy of the Battle of Gettysburg; the "Battle of Serenity Valley". The Independents were defeated by The Alliance, an authoritarian regime.