Complex sentence: The tour came to a successful conclusion with the elimination of the Jaish al Mardir leader in a joint UKSF and Iraqi SF strike; the culmination of an enduring 4 month operation by the Bty.
Split into simpler sentences: The tour came to a successful conclusion with the elimination of the Jaish al Mardir leader in a joint UKSF and Iraqi SF strike. This was the culmination of an enduring 4 month operation by the Bty.