Complex sentence: Wyrall pp117-118 The attack was an unmitigated disaster for the British; it resulted in 12,000 casualties for no territorial gain, was of doubtful benefit to the French, and the inadequacy of the British artillery precipitated a political crisis in the UK.
Split into simpler sentences: Wyrall pp117-118 The attack was an unmitigated disaster for the British. It resulted in 12,000 casualties for no territorial gain, was of doubtful benefit to the French, and the inadequacy of the British artillery precipitated a political crisis in the UK.