'Seydlitz' (v) was a German operation against partisans in the region of Dorogobuzh in the German-occupied western USSR (25 June/27 July 1943).

Lying on the upper reaches of the Dniepr river between Smolensk and Vyaz’ma, this region was vital to the defences and communications of Generalfeldmarschall Günther von Kluge’s Heeresgruppe 'Mitte' at the point where Generaloberst Hans-Georg Reinhardt’s 3^rd Panzerarmee and Generaloberst Gotthard Heinrici’s 4^th Army would receive the brunt of the Soviet late-summer offensive from 23 August. Aimed at liberating Smolensk and opening the way for an offensive to retake Belorussia, the Soviet offensive in the sector would be entrusted to General Andrei I. Eremenko’s Kalinin Front (renamed 1^st Baltic Front on 12 October) and General Vasili D. Sokolovsky’s West Front.