The English equivalent of the Latin command 'Pugnate ad finem' is Fight to the end [or death]. In the word-by-word translation, the verb 'pugnate' means '[you all] fight'. The preposition 'ad' means 'to'. The noun 'finem' means 'the end'.
It means, "To the end."
With God to the end.
The motto of Plumtree School is 'Ad Definitum Finem'.
The motto of Seisen International School is 'Ad Finem Fidelis'.
"He/she/it is here until the end of the dog."
"Until the end of the road" is Usque ad finem itineris in Latin.
The motto of John Ogilvie High School is 'Fidelis Ad Finem'.
"Finem somnio" is a Latin phrase that translates to "The end of sleep" in English.
Amor finem non habet, or Finem non habet amor, or Amor non habet finem.
"To the very end". Often used in reference to battle, implying a willingness to keep fighting until you die.
It's not bad, but frater is singular. For "brothers" you need fratres.
The cast of Respice finem - 1967 includes: Jan Kacer as Narrator