The Warrior's Anthem
"The Warrior's Anthem" was a traditional piece of music sung by Klingon warriors on their way into battle. The song was typically initiated by someone rapping their hands on an available surface to the rhythm of the song, shortly followed up by them or another Klingon beginning to sing with others nearby being encouraged to join in.

The crew of the  sang the song on a mission to locate the  in 2373. ()

Klingon lyrics (by Mark Okrand)
Klingonese
 Qoy qeylIs puqloD.
 Qoy puqbe'pu'.
 yoHbogh matlhbogh je SuvwI'
 Say'moHchu' may' 'Iw.
 maSuv manong 'ej maHoHchu'.
 nI'be' yInmaj 'ach wovqu'.
 batlh maHeghbej 'ej yo' qIjDaq vavpu'ma' DImuv.
 pa' reH maSuvtaHqu'.
 mamevQo'. maSuvtaH. ma'ov.

English translation
English language

Original Lyrics 
 Hear! Sons of Kahless.
 Hear! Daughters too.
 The blood of battle washes clean
 The Warrior brave and true.
 We fight, we love, and then we kill.
 Our lives burn short and bright,
 Then we die with honor and join our fathers in the Black Fleet where
 we battle forever, battling on through the Eternal fight.

Literal translation
 Hear! sons of Kahless.
 Hear! daughters.
 The battle blood perfectly cleans
 the warrior who is brave and loyal.
 We fight, we're passionate, and we kill perfectly.
 Our lives are not long, but they're very bright.
 We certainly die honorably, and we join our fathers in the Black Fleet.
 There we always really continue fighting.
 We won't stop. We continue fighting. We compete.

Appendices

Background information 
The "Warrior's Anthem" was originally created for the Star Trek: Klingon CD-ROM computer game. The English version was originally written by Hilary Bader and translated to Klingon by Marc Okrand, and the music was written by Keith Halper.

Apocrypha
The "Warrior's Anthem" is sung by the character K'Valk in the Star Trek Online mission , and is referenced in the TNG  Diplomatic Implausibility.

Qo'noS
Musical compositions