Complex sentence: Attacked by the armies of, Bretonnia, Kisleve and Orcs the Chaos horde beagn to brake, and when news came that the armies of Karl Franz and Valten were closing, Archaon was forced to lift the siege.
Split into simpler sentences: Attacked by the armies of, Bretonnia, Kisleve and Orcs the Chaos horde was broken. When news came that the armies of Karl Franz and Valten were closing, Archaon was forced to lift the siege.