-New consul- M.Marcellus- aiming to recall Caesar from Gaul (illegal move in itself because Pompey and Crassus' consulship had passed a law ensuring his proconsulship until 49BC) and flogged some Gallic men which humiliated them, infuriating Caesar.
-Curio- Caesar's tame tribune (in return from Caesar paying off his debts) was vetoing any legislation surrounding Caesar's replacement- suggested both Pompey and Caesar to give up commands together.
-Pompey- opposed to this- had no intention of giving up Spanish command (proposed that Caesar should give up his province instead).
-Curio repeated his veto and again suggested a mutual relinquishing of commands to preserve a power balance.
-War in Syria- both Pompey and Caesar donating 1 legion to the east but Pompey sent the legion he had lent to Caesar.
Events of 51BC
-Vote in December 50BC, the Senate on whether both men should resign commands proposed by Curio.
-Overwhelming support- but consul spread rumours of Caesar's preparation for war which forced Pompey to declare his commitment to the optimates.
-Open hostility- Curio's tribuneship was over and he joined Caesar in Gaul.
-Mark Antony and Cassius now tribunes, defending Caesar's interests.
-Similar tactics to Curio, a mutual resignation.
-Letter from Caesar to the Senate- advocating both men give up powers but pointed out possibility of civil war if Pompey were to keep his powers.
-Senate suggested comprimise- Caesar must disarm or be an enemy of the state.
-Tribunes vetoed and Pompey took control of senatorial forces.