October 11, 1923 - observer with a Reconnaissance unit.
September 1926 - serving in the naval aviation unit.
May 25, 1936 - with the dissolution of the naval aviation squadron, Karklins is transferred to the Aviation Regiment's
8th Reconnaissance Squadron. Rank: 1st Lieutenant
October, 1939 - Communications Director for the Aviation Regiment. Rank: Captain
1941 (Soviet Occupation) - arrested and deported to Siberia.