'Osterei' (i) was a German operation by Generalleutnant Karl Arndt’s 293^rd Division, with support from other units, of General Heinrich Clössner’s 2^nd Panzerarmee within Generalfeldmarschall Günther von Kluge’s Heeresgruppe 'Mitte' on the Eastern Front in an effort to prevent partisan attacks on the railway line between Bryansk and Dudorovsky in the German-occupied western USSR (24 April/1 May 1943).