The substance of its reply was, that Pompey did not wish a personal interview, but would go to Spain, and that Caesar must leave Ariminum, return to his province, and give security that he would dismiss his army.
These terms seemed to Caesar unfair, and he would not accept them.
Accordingly he sent his lieutenant, Mark Antony, across the mountains to Arretium, on the road to Rome.

He himself pushed on to Ancona, before Pompey could stop him.

The towns that were on his march threw open their gates, their garrisons joined his army, and their officers fled.
Steadily he advanced, with constantly increasing forces, until when he reached Corfinium his army had swelled to thirty thousand troops.
This place had been occupied by Domitius with a party of aristocrats and a few thousand men.

Caesar surrounded the town, and when Domitius endeavored to steal away, his own troops took him and delivered him over to Caesar.

The capture of Corfinium and the desertion of its garrison filled Pompey and his followers with dismay.