Correspondence between Hatzach U.S. and Movement institutions, various other Zionist institutions and various Jewish organizations:
Keren HaYesod (United Jewish Appeal), Zionist Organization of America, Committee for a Jewish Army, "Mizrachi" Womens Organization, Bnei Brith Hillel Fund, Association of Jewish Youth, Bureau for Jewish Affairs.
Main topics: fundraising; sending publications, articles, books, checks; organizational matters; invitations to events.