When his company in 1788 were included in the newly formed Norwegian Jäger corps, Staffeldt was promoted to major. In the same year he participated with his new unit, in the skirmish at Kvistrum bridge during the Theater War against Sweden. After the war he went to Holstein, where he in 1790 and 1792 learned about the contemporary sharpshooting tactics, and later established the first non-commissioned officer school for Jäger Corps in Norway. After his stay in Holstein, he returned to Norway and married Karen Birgitte Herford in Moss in 1797.
