You searched for: “vestra causa tota nostra est
Vestra causa tota nostra est.
Your cause is totally (completely) ours.

Also, "We support your cause completely." Motto of The American Classical League, Miami University, Oxford, Ohio, USA.

This entry is located in the following units: Latin Proverbs, Mottoes, Phrases, and Words: Group V (page 3) total-, tot- + (page 3)