Complex sentence: The rebels attempted to move against Bin Jawad once more; however, after firing off around 50 rockets and making some advances, they were hit by artillery and air strikes and retreated to Ra's Lanuf.
Split into simpler sentences: The rebels attempted to move against Bin Jawad once more. However, after firing off around 50 rockets and making some advances, they were hit by artillery and air strikes and retreated to Ra's Lanuf.