The 'D-Linie' was a German defence line associated with the disengagement of Generaloberst Karl-Adolf Hollidt’s (from 25 March General Sigfrid Henrici’s) 6^th Army of Generaloberst Josef Harpe’s Heeresgruppe 'A' in the southern sector of the Eastern Front on the western bank of the Tiligul river (late March 1944).