  We examine the depinning transitions and the temperature versus driving force
phase diagram for magnetically interacting pancake vortices in layered
superconductors. For strong disorder the initial depinning is plastic followed
by a sharp hysteretic transition to a 3D ordered state for increasing driving
force. Our results are in good agreement with theoretical predictions for
driven anisotropic charge density wave systems. We also show that a temperature
induced peak effect in the critical current occurs due to the onset of
plasticity between the layers.
