Complex sentence: "Pluto and Beyond" and "Propaganda Machine" can be thought of as coming near the beginning of the Tophet Campaign, as they summarize the events of that the preceding Pluto Campaign and a few Tophet events, without adding new material.
Split into simpler sentences: Pluto and Beyond and "Propaganda Machine" can be thought of as coming near the beginning of the Tophet Campaign. These summarize the events of that the preceding Pluto Campaign and a few Tophet events, without adding new material.