After the battles against Bermont-Avalov, the aviation park personnel was reduced to only include those with
experience and skills which could be used in building the new air force. Ziverts, with the rank of 1st Lt., was retained.
March 5, 1920, with pilot Vasiljevs he conducted a training reconaissance of the Daugavgrivas region.
May 19, 1920 - flew in the observer's seat with pilot Blaubergs when transporting DFW C.V #12 from Riga to
Rezekne, where they were to take part in the Latgale battles vs the bolsheviks.
May 26, 1920 - with Blaubergs, flew a reconaissance mission in DFW C.V #12 to Sebeza, Drisa and Opocka.
May 31, 1920 - with Blaubergs, went on a test flight in DFW C.V #12.
June 14, 1920 - with Blaubergs, went on a test flight in DFW C.V #12.
July 5, 1920 - with Blaubergs, went on a test flight in DFW C.V #12.
July 17, 1920 - with Blaubergs, went on a test flight in DFW C.V #12. Evidently the aircraft was still giving problems
because they subsequently flew the aircraft back to Riga/Spilve for repair.
July 28, 1920 - with Blaubergs as pilot, and additional passenger Rulle, they left Riga in DFW C.V #12 for Rezekne.
The aircraft crashed near Plavinas and all three aviators died.