Many died on the battlefield, from George Butterworth and Cecil Coles to Rupert Brooke's Australian friend Frederick Kelly.
Andre Caplet and Ivor Gurney survived, their health mortally affected by their wartime experiences.
All in all, this is an engrossing and generous slice of history, portraying sorrow (and resilience) with an intimacy that, avoiding spectacle and side-show, connects on the deepest personal level.
Robin Tritschler was outstanding last year in the New Zealand Symphony Orchestra's The Creation. His voice has a refinement and purity of tone without blandness and bluster - there are certainly no lusty vibratos, wide enough to accommodate a World War I tank.
The versatile Tritschler is gorgeously lyrical in Frederick Keel's drawing-room ballads and gives Debussy's portrait of orphans, homeless at Christmas, the immediacy of a Gallic Sondheim.
Two Shakespearian settings from Benjamin Dale are deliciously crisp and he easily conveys the eerie calm when Arthur Bliss sets a child's prayer by Siegfried Sassoon.
It is impossible to pick favourites but two stand out - the rugged stoicism of Charles Ives' In Flanders Field, with Martineau rolling out assorted quotes on the side and a song-cycle by the German Rudi Stephan (1887-1915), in which the autumnal glow of late Romanticism takes on a new and charged significance.