Complex sentence: Like Benjamin Britten's "War Requiem" before it, it is essentially an anti-war piece and is based on the Catholic Mass, which Jenkins combines with other sources, principally the fifteenth century folk song L'homme armé in the first and last movements.
Split into simpler sentences: Like Benjamin Britten's "War Requiem" before it, it is essentially an anti-war piece. Also like Britten's work, this piece is based on the Catholic Mass which Jenkins combines with other sources, principally the fifteenth century folk song L'homme armé in the first and last movements.