A drive mechanism (10) for a tracked vehicle. The drive mechanism includes an electric drive motor (1) for supplying drive power and an electric steering motor (3) for supplying steering power. Mechanical drive elements (4, 5) transmit reactive power between a right-hand drive side (12) and a left-hand drive side (11) when driving around a curve or bend. An electric auxiliary motor (2) selectively assists either the drive motor (2) or the steering motor (3).