Complex sentence: After the UED's defeat on Aiur, Stukov fled to Braxis and activated the psi disruptor in order to attempt to salvage the expedition, but was after Admiral DuGalle became convinced that Stukov was attempting to sabotage the expedition Stukov was assassinated by Duran.
Split into simpler sentences: After the UED's defeat on Aiur, Stukov fled to Braxis and activated the psi disruptor in order to attempt to salvage the expedition. After Admiral DuGalle became convinced that Stukov was attempting to sabotage the expedition, Stukov was assassinated by Duran.