Complex sentence: Television commentators have noted the series'study of personal identity, most significantly through Don Draper's identity fraud during the Korean War in which he took on another soldier's identity to get out of the war.
Split into simpler sentences: Television commentators have noted the series'study of personal identity. This theme is explored most candidly through Don Draper's identity fraud during the Korean War, in which he takes on another soldier's name in order to leave the war.