Complex sentence: Arguably though too many facts are missing to make a conclusive assessment of Viet Cong intentions as to date no definitive Vietnamese account of the battle is available, while those that exist are contradictory or unreliable.
Split into simpler sentences: Arguably though too many facts are missing to make a conclusive assessment of Viet Cong intentions. To date though no definitive Vietnamese account of the battle is available, while those that exist are contradictory or unreliable.