Why did Hitler take personal command of the Eastern Front in December 1941?

Adolf Hitler assumed personal command of the Eastern Front in December 1941 primarily as a consequence of the failure of the German campaign to capture Moscow and the subsequent collapse of the German military's operational success.123

Following the near-disaster of the army's position before Moscow and the onset of a massive Soviet winter counteroffensive, Hitler sought to consolidate his control over military decision-making. He forced the resignation of Field Marshal Walther von Brauchitsch, the head of the Oberkommando des Heeres (OKH), on December 19, 1941. By removing Brauchitsch, Hitler achieved two objectives: he secured a scapegoat for the campaign's failure and cleared the path to take direct, personal command of the army.124

This transition marked a significant shift in the Wehrmacht's structure, as Hitler’s influence over military operations had been growing steadily since 1940. His decision to take command was driven by his desire to enforce his own will—specifically his veto on any extensive retreats—which he believed would restore troop confidence and prevent a total collapse of the front.51