Complex sentence: Mohammad's Army (Arabic: جيش محمد) (Jaish-e-Mohammad) is a guerilla organization that has been operating in Iraq against Multinational occupying forces since at least mid 2003.
Split into simpler sentences: Mohammad's Army (Arabic: جيش محمد) (Jaish-e-Mohammad) is a guerilla organization. It had been operating in Iraq against the multinational occupying forces since at least mid 2003.