Media Vita - Medieval Crusaders Song

Media Vita is a medieval Catholic Gregorian Chant thought to have possibly originated as a 10th-century battle song, but as with a decent portion of medieval music, the exact time that it was created isn't precisely known. It was however recorded and commonly used during the late middle ages by the liturgy and to ask God for aid in times of need.

Composition by Michael McGlynn, and sung by the Anúna choir. You can find more of their work here on YouTube at    / @anunachoir  

Lyrics Latin:
Media vita in morte sumus
quem quaerimus adjutorem
nisi te, Domine,
qui pro peccatis nostris
juste irasceris?

Sancte Deus,
sancte fortis,
sancte et misericors Salvator:
amarae morti ne tradas nos.

Lyrics English:
In the midst of life we are in death
of whom may we seek for aid,
but of thee, O Lord,
who for our sins
art justly displeased?

O holy God,
O holy and strong,
O holy and merciful Saviour,
deliver us not to bitter death.

PS: I'm aware that calling this medieval song a "Crusade" song is a bit of a stretch, it was most likely sung by the liturgy, and potentially the crusaders during some of the later crusades, but as far as I know there's not any conclusive proof one way or another. I mostly used the name because that's what people are more likely to engage with, rather than saying "Gregorian Chant".