In September 1943 the Germans ordered the creation of a Latvian night bombing unit as part of the Luftwaffe.

[6] As a Störkampfstaffel ("Harassment squadron") 1./NSGr.12 flew night bombing missions attacking enemy concentrations, infrastructure, and other targets of opportunity.

[5] A third Staffel (3./NSGr.12) was created in July, but due to a lack of aircraft, flew no operations, and its equipment and personnel were eventually incorporated into the 1st and 2nd Staffeln.

It consisted of the two active Staffel of NSGr.12, and the third (still in the process of formation), the flight school at Liepāja-Grobina, renamed the Ergaenzungs Fliegergruppe Lettland ("Latvian Supplementary Flying Group"), and an anti-aircraft unit.

[6] In September the Legion was relocated further east to a base in Tukums, and in early October flew their last combat sorties in the vicinity of Dobele.

[6] The trust of the Germans in their local Baltic flyers had been eroded by the desertion of five Estonian pilots from Nachtschlachtgruppe 11 (Estnisch) to neutral Sweden in late September and early October.