We can put a name to your Jäger-Regiment zu Pferde officer: Oberleutnant Erland Åberg (1870-1929) of Jäger-Regiment zu Pferde Nr. 3 in 1906. A Rittmeister in JRzP 3 at the outbreak of war, he went on to command Reserve-Dragoner (Schützen)-Regiment Nr. 7 and retired as an Oberstleutnant.