What did the Jewish men ask of from the Captain during the Bar Mitzvah?

The Jewish men asked whether they know Caption Fields during the Bar Mitzvah.

Explanation:

'Island of Roses: The Jews of Rhodes in Los Angeles' is a documentary which is about the Jews of Spain, also regarded as the Sephardic Jews. Bar Mitzvah is a ceremony in Jews where once a child reach the age of 13 he/she becomes an adult who is responsible for his actions.

The Jewish Soldier asked the men whether they know Captain Fields, to which they said they don't know. Later, Jewish men explained that Captain Fields was one of the strongest and bravest man they have ever known.