Complex sentence: The DH.1 saw operational service only in the Middle East theatre, where a few Beardmore powered DH.1As arrived in July 1916-these were used by No.14 Squadron RFC as escorts for their B.E.2 reconnaissance aircraft.
Split into simpler sentences: The DH.1 saw operational service only in the Middle East theatre, where a few Beardmore powered DH.1As arrived in July 1916. These were used by No.14 Squadron RFC as escorts for their B.E.2 reconnaissance aircraft.