Complex sentence: When Ewen Cameron of Lochiel heard of William's landing in England, he began recruiting troops to fight for James; however, clan rivalries, particularly opposition to the Campbell Argylls were often as important as allegiance to the Stuarts.
Split into simpler sentences: When Ewen Cameron of Lochiel heard of William's landing in England, he began recruiting troops to fight for James. However, clan rivalries, particularly opposition to the Campbell Argylls were as important as allegiance to the Stuarts.