From Longman Dictionary of Contemporary Englishmake the supreme sacrificemake the supreme sacrificeDIEto die for your country, for a principle etc → supreme
Examples from the Corpus
make the supreme sacrifice• These were people who showed courage, faith, and were an example to all by making the supreme sacrifice.• We felt that it was a great tribute to us and all our many comrades who made the supreme sacrifice.• You made the supreme sacrifice of your life for your work last night, so don't be shy about admitting it. 