1
general::
Phrase(s): to the last
to the very end; to the conclusion. • All of us kept trying to the last. • It was a very boring play, but I sat through it to the last.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
To the end, especially to the end of one's life. For example, The defenders held out to the last but the bombs finished them. [c. 1600]
American Heritage Idioms